"Bullshit," says Peter, though he's not so sure it is. He glances back at Seth on the instinct that he might be better able to tell if he's shitting him than Daniel, though it's not as if he's spent much more time with Seth. He's thus got his face turned back with Daniel stumbles and yanks him forward and up, with the result that Peter trips over his own next step and tries to throw both hands under him to catch himself, with extremely limited success.