Hunter doesn't know all that much about phones either, but he's never heard of them being able to teleport anyone before. That ability is reserved for doors, thank you, not weird little communication rectangles.

So suddenly finding himself (and Flapjack) amidst a bunch of rusty pipes is enough to completely throw him off. Instinctively, he grabs for Flapjack, who shifts to his staff form, and Hunter points him at Hickey. "I don't know! Where are we?? What did you do?!" Because obviously, this is Hickey's fault somehow.