the carnival effect

a friend of mine, who will remain nameless...

walked home from carnival one night and was approached by a number of men trying to sell him a motorbike helmet.  he couldn't really understand why.  but, not wanting to be conspicuous in his foreigness, he politely declined.

it wasn't until the next day when he was back with the group that he realised they were moto taxis offering him a ride on their motorbike...  genius!