I've seen expanding hematomas immediately post op carotid endarterectomies both on the ward and in the recovery room.
This is a very weird scenario with the "pop" and all, but the approach would be the same. If there were a large hematoma causing airway compression and distress, you'd splash on some betadine, glove up with sterile scissors, zip the sutures and evacuate the hematoma with your finger. That will fix the problem. Direct pressure to the site for bleeding control.
Whatever damage you do to the surgical site, which probably wouldn't be a whole lot, is worth the payoff of avoiding the hypoxic arrest.
If there were no distress, it would be a hurry up to the OR with a controlled induction or an awake FOB (not required that often anymore with VL)