Donnie did not have long to decide what he was doing before Tony was crashing into him. Entirely unprepared for Donnie to stop dead while being pursued by a teeth-monster, he didn't anticipate having to put on the brakes, and only grabbed Donnie by the back of the jacket to try to redirect the momentum, undecided if it should keep them running like Tony thought was the logical plan, or trust Donnie to spin them around and...do whatever he was doing. "What are you doing?!" The irritation was much more audible this time, now that Tony couldn't help but shout in his panic.