1) I sniffed sulphuric gas(i think). We were doing electrolysis with sulphuric acid solution as the electrolyte. I know one of the test tube contain O2. So i wanna breath it in. But then my nose suddenly felt like sharp needles poking my receptors. My lips go dry and i felt weak. I drank alot of waters after that. Didn't tell my teacher or else it's gonna be a big issue.

2) Dumb fuck me made chlorine gas that filled the my whole home bathroom .

During that day, i used bleach to start a redox reaction. I have no idea why i go get vinegar and pour tons of it into my bowl filled with bleach. I directly smell the chlorine gas and it sends chill down my spine. I quickly ran into my room to get my towel and wrap it around ny face but it doesn't work that good. I quickly open all the windows and throw everything into the toilet bowl. My sister didn't know anything nor my family members.

3) i wanna steal NaOH when my teacher not looking to bring some home . I put alot into my pocket. It reacts with the humidity in my pocket and it's a freaking exothermic reaction. my tummy felt so damn hot and i quickly throw every NaOH pallets into the sink. It feels very soapy as well. I knew that NaOH cause an exothermic reaction But i didn't know that my pocket have high humidity. I guess I'll better bring a bottle or something next time.