Continuity mistake: When Homer is try to escape in the quicksand, his eyes are below the sand line. The camera cuts to Moe then back, and now his eyes are visible again. (00:35:35)
Continuity mistake: When Maggie jumps into the sink hole whilst the mob are invading, Drederick Tatum (the Mike Tyson parody character) is seen standing directly in front of the dome. But after Marge, Bart and Lisa have jumped into the sink hole and it cuts to a wide shot, Drederick Tatum is seen a lot further away from the sink hole than he was previously - look closely to the right of screen in the wide shot, that's where Tatum is. (00:35:35)
Factual error: In the scene where the angry mob is attacking the Simpsons in the tree house, Grandpa Simpson is shown aiming a double-barrel shotgun, which he then pumps to ready it for firing. There's no such thing as a double-barrel pump-action shotgun. (00:36:20)
Continuity mistake: When Colin is trying to play "Lisa's song" from the other side of the glass, at first the guitar has an f-hole, and in the next shot of him, it's a solid body guitar. (00:36:25)
Continuity mistake: The Simpsons leave the dome with nothing. However when Marge, Bart and Lisa are on the train and in the EPA van, Lisa has now got her sax. (00:37:05 - 01:00:15)
Continuity mistake: In the motel room after escaping the dome, the circles of light made by the lamps on the walls and ceiling change between shots. (00:40:00)
Other mistake: In the motel room, the poster of Alaska is not reflected in the mirror behind Marge. You can only see the little lamps next to the bed. (00:40:15)
Continuity mistake: When Homer is riding the motorbike around the ball of death, the first try he has the bike does not have flames painted on but after the third try the flames have appeared on the bike again. (00:41:30)
Continuity mistake: In the shot where we see Homer first in The Ball Of Death, two pink tents are visible in the background. But when it cuts to the wide shot, the two tents in the background have disappeared. (00:41:30)
Audio problem: When Homer fails motorcycling around The Ball Of Death, the shot cuts to inside the Ball Of Death. About a second after the shot cuts inside The Ball Of Death, Homer is heard sighing. But his mouth doesn't move. A sigh like that would require his mouth to move. (00:41:40)
Continuity mistake: At the carnival, when the Simpsons reach the spherical cage, the pick-up truck is parked right beside the base of the ride. In the shot of Homer's failed attempts at riding the motorcycle around the sphere the truck is gone, though it should be seen in this shot. (00:43:00)
Continuity mistake: In the scene where the newscast (Day 37) is being watched on the TV at Moe's, in the first shot of the TV there is a dart in the roof, but in the long shot the dart is no longer in the roof. (00:43:40)
Continuity mistake: When Bart is proving he is sober, Homer is pumping petrol and eating a hotdog. The camera cuts and Homer is eating a hotdog but not pumping petrol like he was a second before. (00:43:45)
Other mistake: When Springfield loses all the power, Mr. Burns' manor (with the Happy Holidays from Mr. Burns sign on it) seems to have appeared out of nowhere. (00:44:00)
Continuity mistake: At the gas station market, when Bart puts the can of soda pop on the counter, we see the yellow label on the glass beef jerky jar, facing away from Bart. When Marge points to the beef jerky its label has vanished, then when the clerk points to the similar looking family the label is back. (00:45:00)
Other mistake: When Mr. Burns is talking to Apu, Doctor Hibbert and Chief Wiggum about supplying Springfield with power, he is writing with his right hand despite being left handed. (00:45:00)
Continuity mistake: When the Simpsons are driving to Alaska, Homer puts the poster of Alaska on the window. Marge then removes the poster and we see the van is going out of control. In the next shot that shows them screaming, we can see they are driving totally normally judging by the view from the back window. (00:45:05)
Other mistake: When Homer is collecting firewood his footsteps start randomly in the midde of nowhere, with no tracks to the trees he came from. (00:45:55)
Continuity mistake: The bottle of ink and quill on Mr. Burns' desk disappear for one shot. This happens when Apu, Chief Wiggum and Dr Hibbert are asking for some electricity. (00:46:05)
Continuity mistake: When Homer tells Lisa to clap in Alaska, there is some snow on his left ear that moves to the top of his head. (00:46:05)
Answer: Homer has been known not to make the smartest decisions, and the decisions he does make, he makes without fully thinking them through. Clearly he wanted to get some donuts as quickly as possible without thinking of any other ways, so he decided to ditch the silo in the lake as it would be the fastest way of getting it off his back, even if it's not the smartest. Also, putting that aside, he likely wanted his own pick of the donuts rather than have Lenny guess what he wanted.
Casual Person