The Bar at the End of the Universe

Dean had been in the bar a few days, long enough that he was familiar with how things worked. More or less, anyway. He was sitting at a booth near the observation window, watching the colliding worlds destroy each other, with an odd fascination.

Maybe someone would like to come and talk to him, before he goes mad from boredom. He has a beer and a pizza, he's willing to share the pizza, even though he could eat the entire pie by himself, he probably shouldn't.

No one ever really expects to fall through a portal, the first time. That's why, when he hit the floor inside the bar, he scrambled up, hand going for the gun at his hip before remembering he'd taken the holster off.

He stepped back, hand still at his hip, as if he expected the gun to materialise there. LAPD Detective Dean Bendis has come to the bar at the end of the universe. Someone kindly please explain what's happened, before he destroys something.