When someone you're with seems to instantly disappear into thin air,
Taken from the battle between Darth Vader and Ben Kenobi in Star wars IV where Kenobi is hit, disappears and leaves a pile of robes on the floor.
Tom: Where the fuck's Smit gone
Miles: Eh...Looks like he's done a Ben Kenobi. shame he left that pile of robes.
Miles: in all seriousness he's probably just gone for Dinner.