You know it is an awesome party when Spider-Man drops by for a visit!
But these enthused kids were not expecting this as part of the show.
After showing his agility and spidey skills with a few flips and trips, the entertainer lands awkwardly and manages to knock himself out.
At first people stand back to see if it is part of the show and the kids continue to giggle but very quickly people realise it is no stunt.
We hope Spidey recovered and is back to his super powered self!
The birthday party was held in Argentina.