It's a poor enough movie but for my sins I was watching this last night via Veetle.com and I saw one of the bad boy characters 'Loony Bin Jim' squeezing his gripper. It looks an awful lot like a Heavy Grips Gripper but must have been as weak as piss because he's repping away like there's no tomorrow, complete with the spring squeaking away. Google images, as always, provides:
