Continuity mistake: When the helicopters approach the oil rig there are only 5, and 5 dots appear on the radar in the control room, but when the attack starts there are now 6 helicopters.
Revealing mistake: In the opening scene when Bond pushes Blofield in the mud and we see his legs dissappear, they are obvious dummy legs and the feet have changed position.
Continuity mistake: When Bond exists the car park using the trailer as a ramp he skims the tops of several parked cars, but when the police car tries it, the car crashes into a police car that has appeared from nowhere - it hasn't just pulled up as it is driverless.
Continuity mistake: When Bond is dumped in the pipe he is lying in the middle, also when the pipe is picked up he is in the same place, but when he comes to he is now lying on a join in between two pipes.
Continuity mistake: In the opening scene Bond drops a load of mud type mixture onto the guy in the bath and we see the mixture overflowing on the sides where Bond is lying but when he gets up he is completely clean.
Continuity mistake: In the Freemont St. Chase scene, Bond passes the same casinos multiple times going the same direction without ever turning.
Audio problem: When the man at the very start is being interrogated about the location of Blofeld, he says "Ciaro", but his lips don't move.
Revealing mistake: During the fight between Bond and Peter Franks in the elevator, if you watch carefully when Bond hits Franks' wrist with the door while he is holding the glass shard, Franks drop the glass shard before his wrist gets hit a second time.
Continuity mistake: When Thumper dives into the pool after Bond, she is wearing a gold band on her left arm. After she surfaces, it's mysteriously disappeared. (01:52:00 - 01:53:00)
Continuity mistake: When Bond is being strangled by Mr Wint, he smashes a bottle of Courvoisier and throws the contents at Mr Kidd who is holding the flaming skewers. When Mr Kidd's arms are set alight, Tiffany getting up from the table, and in the next shot, she is getting up again to stand by the wall.
Continuity mistake: When Bond is fighting Peter Franks outside of Tiffany's apartment, Franks swings a crowbar at Bond. Bond then kicks Franks and the crowbar falls out of Franks' hand. When Bond begins squirting the fire extinguisher at Franks, the crowbar is back in Franks' hand again.
Continuity mistake: During the final fight scene with Bond and Mr. Wint, Bond ties a bomb on Mr. Wint's coat-tails. When Bond hoists Mr. Wint overboard in the next shot, the bomb has disappeared.
Revealing mistake: When Bert Saxby is shot there is no hole in his shirt, only painted on fake blood.
Revealing mistake: When the row of missiles blow up near the end, not only are the effects bad but the amount of smoke shown is cartoonish and the missiles are still intact afterwards.
Other mistake: In the opening scene when Bond is looking for Blofield his voice sounds dubbed and the hands we see, etc. are not Sean Connery's.
Other mistake: When Bond first meets Bambi and Thumper, Thumper is lying on a rock directly in front of Bond but for some reason he doesn't see her until she introduces herself.
Revealing mistake: When Mr Wint puts the scorpion down the back of the doctor's shirt while he is looking at Mr Kidd's wisdom teeth, the scorpion is made of plastic and not a real one.
Revealing mistake: When Mrs Whistler's body is being removed from the canal in Amsterdam, it's clear in the long shot that it is just a dummy.
Continuity mistake: After Bond pulls the chain near the mudbath, the mud falls down as a thin stream. In the next shot, it's much thicker. (00:02:40)
Revealing mistake: When Bond knocks Blofeld unconscious with a lamp in the fight at the start of the film, look carefully and you can see that Blofeld is already knocked out before the lamp comes into contact with his head.
Answer: If you mean by hiding - why is he never seen normally - then it's because he is a recluse and doesn't like to be seen in public (like Howard Hughes was). If you mean by hiding - why was he not seen during the movie - then it's because he was being held captive by Blofeld and his minions. Spectre didn't want him out and about ruining their plans.
Zwn Annwn