Clint and Natasha
Clint didn't need reasoning for the decision, he never really did, he just needed a directive and a fairly competent decider and he was prepared to follow that order. Clint was in no way a leader of any sort, but he knew reasonable from insane and provided they never fell into the suicidal form of insane, Clint could deal with someone taking point. The fact that for all intents and purposes it was Natasha taking point just made the choice easier.
"Just darting around the corners." As if she or it was holding back, letting them know what way to go, leading them on a merry chase. Not completely unheard of in this hell hole, didn't these kinds of monsters like to play with their food after all? But the fact that the chills up his spine just built the further through they went, the nasty feeling of something behind off getting worse, it almost felt like they shouldn't be following her.
Which of course just made Clint want to follow faster.
The building itself was a mystery, so the fact that the whole room felt alive right then, like it had it's own steady heartbeat echoing around them just added to the foreboding sense of dread. "Common sense would state that we should not follow her. Which means, naturally, we should probably follow her quicker, before she gets bored or the floor and walls open up and eat us. Which is a possibility at this point I think."