Last time was when my dog crawled into my lap and then launched himself using my nuts as the take off point. About a 7 on a scale of ten.
Worst time by a female, and worst period. In 8th grade, the girl who's desk was facing mine blasted me under the desk. It was amazingly painful a 10 on a scale of 10, and the closest I ever came to throwing up from it.
Worst one from a dog. My friend had a Great Dane puppy, it wasn't tall enough yet to not be able to run under my legs. He did, and then the tail "twanged" me as he went through. Almost as bad as the 8th grade kick a solid 9 on a scale of 10, at least.
Funniest one was by a hooker. I was throwing this hooker out of the casino I worked at, and she suddenly gave me a shot. It hurt me just bad enough to piss me off severely, and so I just punched her in the face. She went down on her ass, and yells, "Hey, you aren't supposed to be hittin no lady!" I cuffed her up and she starts blubbering, saying that I'm voilating her rights, and that she didn't do anything to get arrested for. Then, while we are waiting for the cops to come, she tries to kick me there again, so I slapped the hell out of her. Then she tried to spit on me. She ended up spitting on one of the cops instead, and was bawling her head off as the took her away. I told her as they drug her out the front door, "Hey baby, have a good time!"
As pissed as the cops were, I'm sure she had one.