With Knight, the overthrow out of bounds and throw behind the receiver are just as good odds, and probably better, than him actually completing it.
As it was, because he has no arm strength, he threw the ball behind the receiver, weakly, into a coverage with a safety over the top. The argument about the safety is moot because the corner knew the coverage called, so he knew he could jump the route and get away with it.
Although, the more you watch the clip, the more ridiculous it becomes to keep saying he "jumped" it. I mean, Neal had barely turned around. The corner, really, had very little work to do on that one.