more questions about four year old ds

[chipkid]

Yesterday took ds to a schoolfriend's birthday party which consisted of a bouncy castle in a church hall.
Ds always gets over excited and physical at these parties.
Was watching ds and he was being pucshed, shoved and jumped on by the others-but he loves that sort of play.
When he starts pushing back or jumping on the other boys they start crying either to me or their parents "ds has just pushed me ..." at one point one of the children hurt his foot and complained that my ds had alternately pushed him or hit him-ds didn't as he was with me when the accident happened.
ds can be rough-but I am worried that the other boys-who are at times just as bad are constantly blaming ds for everything and ds is too young and daft to realise this!
I tend to rty and stay out of this stuff and let thenm sort it out themselves-but am struggling with this-
what shall I do?
sorry long post

[Tommy]

stay out of it
Hopefully, by the time they're 5, you won't have to go to the parties and you can just let them get on with it.