[This is true btw]
During my 3rd period class one day, I decided to use a spray bottle full of something, but I didn't pay attention to whatever it was...
I thought it was water, but then I wondered why the water smelled funky, until I looked at the label and I saw that it was ammonia water and I immediately turned on the water on the sink since I sprayed the sink with the ammonia water, and luckily, I got rid of the smell and the ammonia water that landed on the sink.
[And also, nobody noticed, not even the teacher]