Last bad one for me was picking up a stainless steel saucepan. Gas was slightly of centre so had been heating the secondary handle. Ended up with Bacarat (reversed though) branded into my hand because I didn't want to drop the boiling pasta water all over myself. Bloody hurt that one.
I picked up a glass tube straight out of a furnace, it wasn't glowing but it was bloody hot. A few hundred Cs. For a few weeks my hand looked like that nazi guy from raiders of the lost ark, seared into a grasp shape. It was fairly painful. Luckily no scars.
The danger of heat can't be seen with eyes, it has to be learnt well for each situation.
We have an unwritten rule in the house that anything in the kitchen that's hot from the oven gets a towel or mitt thrown over it, but I should have known better than to assume. All good now.
I think I got to the cold tap quickly enough to avoid any damage, still stings tho. On the plus side, I have no fingerprints on 3 out of 5 digits - what should I do with this superpower?