Bus Mugger

Your Picanto is at the shop, so you have to take the bus (The Picanto has become IYWTG's resident vehicle). Lucky for you, the bus stop is just down the block from your house.

You sit around for about three minutes then the bus comes. You get in and take your seat (no senior citizens, so you don't have to worry about having to stand up). You're just looking around, minding nothing in particular.

That is, until you see a particularly weird-acting fellow. Then, you notice one of his hands is inside the pocket of a young lady next to him. The woman isn't noticing anything, and the man isn't noticing you noticing him (tee-hee).

The man could be armed, and he's obviously stealthily mugging the woman next to him. It might be her cell phone or her wallet, or something else important. So, what do you do?