Stiles had been too concerned about trying to get a hold of his misbehaving pup to notice the mess Derek was getting himself into by just standing there with a smirk. Not until Batman tried to run for it taking not only Derek out but Stiles out to when Derek landed on Stiles.
The teen’s air left his lungs as he was squeezed and his ribs protested at the weight. So many he could have used a couple more days worth of rest. He wheezed under Derek, trying to get the air back into his lungs when Batman decided it was a good time to attack. He started to hop on their heads, wanting to play, and lick whatever skin he could find.