It probably only works in Canada (or USA) but I once scared the living bejaysus out of a tankie colleague of mine by sneaking to the back of his bivvi with a can of compo rice (it is dried rice in a tin). After giving it a bit of a shake and a tap to the side of the bivvi he was awake.
I then proceeded to impersonate a fairly unamused rattlesnake by shaking the tin and and smacking the side of said bivvy. After about 3 minutes of these antics he managed to wrestle himself from the green maggot and stood and ran taking bivvi, bag et-al with him. He sadly didn't get far as the rest of the squadron was stood all around him enjoying the spectacle..... needless to say I was not his best mate for some time......
I'm sure most chavs would not know that we don't have rattlesnakes here in blighty so it may just work ;o)
I then proceeded to impersonate a fairly unamused rattlesnake by shaking the tin and and smacking the side of said bivvy. After about 3 minutes of these antics he managed to wrestle himself from the green maggot and stood and ran taking bivvi, bag et-al with him. He sadly didn't get far as the rest of the squadron was stood all around him enjoying the spectacle..... needless to say I was not his best mate for some time......
I'm sure most chavs would not know that we don't have rattlesnakes here in blighty so it may just work ;o)