Leo slips his hand down so it's holding Donnie, unfazed by the claws he finds instead of normal reptilian fingers. Hold on his brother secure, he starts to lead them both away.

Where he's going, he isn't sure; back to the convoy is his vague inclination. Even that isn't safe as they draw near the tower, though; but it's the best place to be in all this madness.

Probably.

So he drags his brother along and tries to get them both out of here.