Poe doesn't shout, exactly - but damn does Finn make it impossible to hold on, so his own cry is kind of a gurgled half grunt deep in his throat - coming even as Finn collapses so that most of it ends up on him, rather than in him.

Poe digs his hands into the sheets as he shudders, slowly coming back to his senses.

"Fuck, Finn..." Is all he manages, for the moment.