[Benjamin is careful not to touch him as he cuts him free. The razor was sharp enough to cut a hair in half before this, so in the work of a moment he's cut through the seatbelt.

When he looks up at SpongeBob again, he notices the arm and goes pale, but puts on the most reassuring tone he can.]

...Nothing- nothing to worry about. Just, do me a favor and hold that arm close to your chest for a moment, if you would. We'll get it feeling better soon.