When Smithers (not identified by name in the movie) gives Alex his kit, it includes a fountain pen which shoots a dart filled with Sodium Pentathal. That's supposed to cause a person to do what Alex says. Sodium Pentathal is a form of barbiturate. Barbiturates cause impaired coordination, therefore it's unlikely that Mr. Grin could have flown a helicopter under its effects. See more...
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The entry you are correcting is:
|Original entry||When Alex climbs out of the chimney in the house at the training camp, there are bits of straw on his woolly hat. In the next shot, they are all gone.|