Other mistake: In the bobsled chase, Blofeld arms a grenade, which drops to the floor of his sled, where it rolls around with every turn. He arms and throws a second grenade onto the track, where it is detonated by Bond's sled. The original armed grenade loose in Blofeld's sled never detonates, even when that sled crashes.
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Suggested correction: He never arms a second grenade, he picks up the one he drops and that's the one he throws at Bond. There is only ever one grenade.
