According to booking records, Foster was charged with loitering to beg and violation of a promise to appear.
In other words, he was panhandling, and somebody felt threatened by a man who looks like a hairy version of Edvard Munch's The Scream and called the cops.
It's tough to look good in a mugshot, so maybe foster was just having a bad day.
So don't write Mr. Foster off just yet -- a few weeks in the tub and a trip to the barber, we bet this guy comes out looking like a younger, taut Sean Connery. With a lot more hair.