I got hit by a 9ft burm I used to have a few years ago. It was my own fault though. I gave him a rabbit. I forgot to wash my hands and when I went to change his water bowl he got me across the knuckles. It was something I won't forget. I also got tagged on the elbow by a 13ft retic 10 years ago. That one was by far the worse of the two.
I get nipped every once in a while by my nile but not really hard bites. He has calmed down big time. Two bites in all the years I've been keeping reptiles isn't too bad I guess.