Cap was in no mood to play nice right now, and the moment he saw Whiplash dropping he hurried to get on top of him, grabbing his injured wrist and pinning it against his back to get him to co-operate.
"You ruined the wrong little girl's birthday," he growled in his ear, being rougher than he really needed to be as he forced him down to his knees. "Turn that thing off before I break that wrist too."