Let's see.
A pretty bad one on my left boob (left a scar) when I lifted up the lid on the HLT and shot 190 degree water at my entire chest. That was about a year ago.
Burned my right arm on Thurday, with second degree burns, when my arm got caught between the empty MLT and the boil kettle.
Otherwise, just a few miscellaneous burns and stuff over the years. Nothing major really!