There are bigger ones in Asia, (Not saying I live in Asia, because I don't.) They have orange black striped ones called Asian Giant Wasps O.o You wouldn't wanna be stun by one of those...
Was it on you?! I once had a bee on my hand when I was a little girl. I'd never been stung before so I was scared cause my mom has been stung by wasps normaly the smaller versions, once in the chin too. Terrible. I was so scared of the bee I guess I was brave enough that the bee didn't feel scared, I turned my hand over and slowly wipped the bee off my hand on the bus bench and once it flew away I cried on my mothers arm!
...I have never seen a yellow wasp. In Australia, we only get orange ones that are twice the size as that xD