Let's not do that again.

Simon is having a moment of reflection after discovering that leaping up four stairs at a time was one step too far.  You can see the claw marks in the carpet of the step where he missed his goal--kinda reminds me of Wile E. Coyote in the Roadrunner cartoons.
Simon was uninjured, just a bit rattled.  A couple of noogies later and he was good as new.