That's John Wall, a soon-to-be Kentucky Wildcat, dunking on Jerry Stackhouse. Now, Stack is not LeBron… but he is showing LeBron here how to handle getting dunked on.
Step two: Continue playing basketball
That's it. In fact, you can see Stack looking for the ball so he can take advantage of Wall's celebration… and maybe score a couple of points while everyone's oooh'ing and aaaah'ing.
If it wasn't for LeBron's insanity, I wouldn't have even posted this dunk. Sure, it's a nice dunk… but it's not a big deal. Because things like that happen in basketball.