Watch: 'Spider-Man' knocks himself out doing backflip

This is the moment a children's party Spider-Man attempts a backflip and knocked himself out.

The video, posted to YouTube, is apparently from a children's party in Argentina.

The impersonator first of all nails a few flips and tricks.

But then he pulls a child out of the crowd to show him how to do it, and it all goes terribly wrong.

The performer appears to be coming round by the end of the video.