we use the ping pong rule sometimes
if theres too many people on a joint and theres arguments
whoever has it at the time shouts 'ping' loud enough for everyone to hear
whoever says 'pong' first gets it next

but sometimes theres biff watchers who stare right when your near the end of your bit
so recently we started sayin 'pink' and if somebody says 'pong' theyre out n get none, you need to say 'ponk' to get it then