Doctor Faustus Act 3, Scene 3 Summary

Robin and Dick enter, carrying a cup.
Robin tells Dick that he hopes his devil can get them out of trouble for stealing the cup, since the tavern-keeper follows hard at their heels.
Sure enough, here comes the tavern-keeper, demanding that these two hooligans hand over the stolen cup.
In a hilarious moment, Robin and Dick pass it back and forth between themselves as the tavern-keeper searches them. This is funny stuff, Shmoopers, so be sure to check this scene out for yourself.
Finally, Robin produces the cup, and the tavern-keeper curses them both and demands they hand it over.
But they've got something else in mind. Robin has Dick draw him a circle, and calls the devils Demogorgon, Belcher, and Mephistopheles.
Uh oh. Mephistopheles enters, irritated to be summoned by these fools. Don't they know he has bigger fish to fry?
Robin offers him some supper and a few coins for his trouble, and says they called him as a joke (presumably to freak out the tavern-keeper?).
A joke? Really? They joked with the devil?
In retaliation, Mephistopheles transforms Dick into an ape, and Robin into a dog, then returns to Faustus, who's still busy on his European adventures.