Probably not outright violence, at least not immediately, unless you do something to piss him off.
He's as much out of his element as we are, so he'll be careful and figure out what he can work with, and wait for the right moment to do... whatever it is he might want to do. But even then, he's more likely to come after people from my world. Hopefully he'll just continue being a thorn in our sides and leave the rest of you alone.