So what do you get when you are an idiot, don't take a warning label seriously, a spot in your tank you want to fix, and a distraction?
Answer; burned fingers, broken glass in your tank, and a shattered aquarium heater.
I needed to move something in the tank so I took the heater out, set it aside, and did what I had to do. Well, one thing led
to another and it took a few minutes longer than I thought to fix the problem. I picked up the heater, burned my fingers, it drops into the tank, shatters because of the temperature change, and I spend the next few minutes pulling glass from the tank.
Yay...... I am a dumb [moderator edt: dumb]. Just wanted to share.