"The poster who suggests a diversion such as going nuts, breaking furniture, starting an argument with the guy next to you is right on. The agressors are not that quick mentally and you could take them by surprise. "
spot on I reckon....I`ve walked away from a similar situation by doing the crazy act...threatening to pound someone seriously bigger than you is the last thing they expect
...first sign of weakness and its all over if you dont have the training to defend yourself...
p.s. many thanks George for the informative reply