360i CEO Bryan Wiener spent one of his summers sweating away in a Kool-Aid man costume. That's just one of the odd jobs held by today's ad execs over the years. Vitro's Tom Sullivan was once a repo man. Engine Group's Nina Jasinski sold shoes, and Draftfcb CEO Laurence Boschetto was a baker. Martin Agency CEO John Adams spent a summer digging graves, which, he explains, is very precise work.