@tmdb98956323 said:

If he really had a concussion and got unconscious, he wouldn't start dancing around and jumping onto the fence to reach out the audience. He would rather wave to the audience and go to the rest room quietly. But it shows he was very energetic right after getting a concussion? Seems he did it on purpose to get some camera attention.

I never had an interest in this movie, but one night my gang tossed it in the VCR and we watched it. I don't remember much, but that scene always bugged me. Perhaps if I'd been able to pay more attention it might have made more sense/been more plausible, but, I could never make sense of it as is.