Note that I had the same experience, but I waited a while and it turned out that the terminal was still sending things to the phone: after a few minutes the terminal pushed a few more things, then said "restarting device..." and then the phone (a Nexus 4) rebooted. It was quite disconcerting to see the error message on the phone screen, though: I'd got as far as half-typing a question about it into IRC before it became clear that it was still working.
Note that I had the same experience, but I waited a while and it turned out that the terminal was still sending things to the phone: after a few minutes the terminal pushed a few more things, then said "restarting device..." and then the phone (a Nexus 4) rebooted. It was quite disconcerting to see the error message on the phone screen, though: I'd got as far as half-typing a question about it into IRC before it became clear that it was still working.