According to sources, Evanston resident Danny Vebber, 16, will insert a coin later this afternoon. Though not confirmed, it is believed the coin will be dropped into a Mortal Kombat II video game machine. 'Danny's planned coin insertion does not surprise me,' Northwestern University professor of sociology Herman Janks said. 'The average 16-year-old boy spends the majority of his day inserting coins, whether it be into video games, soda machines or cigarette dispensers. And when these teens aren't inserting coins, they're usually busy looking for more coins to insert.' According to Janks, by the time a boy like Vebber turns 17, he will have inserted more than 31,000 coins into some 4,800 slots. 