coffee disarm

Eiker unhesitatingly turned his gun towards the voice that had spoken to him.
But before he could, Kamijou threw the contents of the bucket he was holding in both
hands at Eiker as if he were putting out a fire in the kitchen.
The contents had been boiling coffee.
What happens to someone who has that poured over them needs no explanation.
“Gwaaaaaaaaaaaaaaaaahhhhhhhhhh!!”
Eiker screamed and writhed around and Kamijou smiled as he threw the empty bucket
aside. He lightly kicked the handgun Eiker had dropped and it sank into the puddle of
boiling coffee.

- Toaru Majutsu no Index Volume 17, Chapter 2 Part 19