Thunderflash... Ahh such fun in a wee cardboard tube...
Tennis ball, length of downpipe with one end blocked up (strengthend with harry maskers) 1xThunderflash. Aim pipe (ish), strike thunder flash and pop into the tube followed by the tennis ball and any other odd bits of soon to be flying junk... Run...
Blue Tardis, carabiner, thunder flash, victim. Observe victim go into Tardis, quickly position carabiner in the lock, strike thunder flash and drop down the chimney... Run... (works better if the Blue Tardis is somewhat full).
Other variations on ex/ops without the bang bit just involves the carabiner and rolling the tardis around the location a bit.
While not a 'mess prank' but of note anyway...
Young one pip wonder (a particulary hopeless one if thats possible) on his second excercise in Germany didnt listen to words of advice from troop S/Sgt or Sqn 2i/c and decided that one of the 432's would be his personnel bedroom for the night and chucked the driver and half section out into the cold and shut the door.
He failed in a number of ways, apart from evicting said driver (Corp tradition, driver gets first dibs on the wagon) he closed the rear door and failed to secure the mortar hatch
Once snoring sounds were heard a carabiner went on the rear door, commanders hatch and drivers hatch followed by a slightly miffed wild german piglet (boar) in through the mortar hatch and yet another carabiner on the hatch lock... Screams were then observed coming from a) the now very miffed piglet and b) the occupant. Driver and section retire to another panzer.
Troop S/Sgt let the piglet out in the morning, troopy was found curled up on the drivers seat with half the G10 stacked on the commanders seat to keep piggy away, don't think either of them had much sleep that night... Piggy left calling cards all over the back of the 432
