I really think you oughtn't to be showing children your enormous, knobbly dome, tbh. :-(
Whenever I am forced to travel the Northern Line, I prowl up and down the carriages bellowing into passenger's faces that I have an atom bomb in my pocket and they must pay for having murdered my mother.
I learned a long time ago there is only ever one nutter on any train so to avoid the nutter on the train, one must simpy be the nutter on the train.