You can contruct a hand held gun using coke cans/OM15 cans firing a bodge tape ball/frozen orange using MEK as a propellant.
OR
for the really brave an "upgraded" version of the MEK cannon capable of firing a football sized object well clear of the hangar and a long way over the pan(somewhere near VASS alledgedly
), don't forget the oxygen trolley to purge the system with O2 before lighting for extra oommphh
OR
for the criminally insane an improvised explosive device using dry ice a little water and empty coke bottles, ideally you screw the lid on as you drop it into a full rubbish bin in the crew room at 0300, rapidly retreat and watch the mayhem
OR
used in pairs with the aid of a length of drainpipe to make an effective mortar, ideal when the other squadron have their hangar doors open, can't beat an airburst device with the noise of a thunderflash going off at the top of the open doorway, especially if the hangar doors at the other end are closed!