Continuity mistake: When Cheech is turning over his car to pick up Chong you see him starting to turn over before he reach Chong. When it cuts Cheech has passed Chong before turning over. (00:07:40)
Revealing mistake: When Cheech and Chong are parked in their car smoking a joint, the car is filled with smoke. The smoke must come from a smoke machine outside as it is moving around very fast as if blown by the wind. (00:13:25)
Continuity mistake: When Cheech stops to pick up Chong, the driver's window is down. A moment later, it's up.
Revealing mistake: During the Battle of the Bands, when Cheech is playing his electric guitar it is not plugged up. Also, his voice is echoing through the stadium but he's nowhere near a microphone. (01:15:20)
Continuity mistake: When Chong's father is shouting "we're not gonna have a family brawl," there is a big bottle of juice on the edge of the table by Chong. It cuts away for three seconds and then back to Chong. The bottle of juice has moved to the middle of the table. Also, Chong has poured juice into the mixture. He wouldn't have had time to do all that in just three seconds. (00:01:35)
Revealing mistake: When the cop on the motorcycle pulls Cheech and Chong over, one of the hippie girls is sitting in the front with Chong. Chong orders her to get in the back. She goes back behind the curtains and sticks her head out front. He pushes her back again. In a shot from the back of the van, you see Chong pushing her back, but you also see through the crack in the curtain that it is totally dark in front of the van. Since there is daylight outside, it shouldn't be totally dark. (01:00:25)
Continuity mistake: When Cheech asks Chong if he is driving ok you can see a lot of smoke inside of the car. When it cuts all the smoke is gone. (00:13:35)
Continuity mistake: When Cheech pulls down his cap in front of his eyes and shouts "I'm blind" you can see some cars stop beside them. When it cuts the cars are gone. (00:17:30)
Continuity mistake: When Cheech says "He's right man, these are lame" to Curtis, one of the band members is standing behind Curtis. When it cuts to a closeup of Curtis, the guy is gone. (00:21:25)
Audio problem: When Cheech and Chong are being questioned by the officer at the border, the officer says "you got any narcotics, any marijuana in here?". His lips continue moving but we can't hear him. (00:45:45)
Continuity mistake: When the band is done playing, sparks shoot out of Cheech's guitar and the guitar is burning. When it cuts, the guitar isn't burning anymore, then it is burning again. (01:17:35)
Continuity mistake: When Chong is walking by his father you see him carrying some items in his hand. When it cuts he is carrying the items in another way. (00:02:20)
Continuity mistake: When Cheech and Chong come into the courtroom, the judge takes off her glasses and holds them. When it cuts, she isn't holding them anymore. (00:18:30)
Continuity mistake: When Cheech and Chong have parked the car and Cheech asks "Am I driving OK?", Chong is holding the joint. When it cuts, the joint is gone. (00:13:35)
Continuity mistake: In the beginning when the kid is crawling on Cheech, you see Cheech putting him on the floor head first. When it cuts he is putting the kid on his feet. (00:00:35)
Continuity mistake: When Cheech is getting off the couch, you see him putting his foot on the floor just missing the bowl of cereal. When it cuts to a closeup, you see his foot going right into the bowl. (00:00:40)
Other mistake: When Cheech and Chong are crossing the street talking about Cheech's uncle, two buses are coming. When the second bus passes by the camera, a kid on the bus waves his hand to the camera. (00:38:15)
Continuity mistake: After Cheech has asked the girls if they need a ride he spots Chong hitchhiking. He then takes a u-turn to the other side of the road. At this time you still see the girls sitting in their original position. When it cuts you suddenly see a van has appeared from out of nowhere and the girls are suddenly walking to it. (00:07:35)
Visible crew/equipment: When Chong gets into the Beetle and drives it out of the garage, the shadow of an arc light can be seen on the car.
Continuity mistake: After Chong fights with with his parents, he walks away and his mother is looking at him smiling. When it cuts, she is suddenly doing her toenails. (00:02:25)
Answer: The lead singer is Rick Wilder. The band is credited as "Berlin Brats" (The Groups). The song is called "Psychotic", or sometimes listed as " (I'm) Psychotic", but it seems the middle part was cut out for the film or maybe arranged differently for the film.
Bishop73