It was one of the funnier scenes (among many) in Four Lions, the jihadist comedy from last year. New recruits training in Pakistan, firing a rocket launcher at an overhead American fighter jet, only to realise it was pointing the wrong way round and they blew up the nearby training camp instead.
Farcical it may have been, but it was based on a true story.
Anyway, the rocket launcher in question (sorry to break the illusion) was a prop, and it is now being sold on eBay to benefit the Institute Of Cancer Research as part of a Sod Cancer campaign.
Although it may be a good idea for only Great British citizens to bid for this, I bet it will be hell getting this through customs.
Other items include the prop model Swiss Hotel from movie Bunny & The Bull, the wall clocks from Charlie Brooker's ScreenWipe, a toy rabbit from the set of Miranda, and Big Brother prop cameras from Dead Set.