I was burned by the business end of my wort chiller, steamy superheated water shot out, richoched off my sink, and up onto my hand and neck. Ouch. I was in a lot of pain but still had to finish my beer. I missed taking my grain bag out and ruined a batch of triple as it was boiling with grains in it. For 2.1 pounds of pilsner I was willing to dump it. I finished my dubble and went to the store. I was 3 hours from being done with the belgian brew day, instead it's carried over to tonight.
It's important to remember this is a dangerous hobby and that you have to be careful at all times. This could have been much worse. There are many chemicals used in brewing that can burn your skin, blind you, etc. Hot sugary water is also a concern. As is steam.
Haste makes waste as well, I messed up a beer I brewed to be fruited by dry hopping it, I am going to start over and brew the original beer again rather than just going with it.