Lessons learnt! And better to learn it now when you're young and can recover, and had a friend nearby to grab the barbell. Now you now. And to add to everyone elses advice, when testing a max weight, go up in the smallest increments you can. So go up by 2.5kg increments if using kg, for example.

Also screw your bully, if he mocks you for it just agree with him! I took the wind out of someone's sails like that before. They were expecting me to protest and I just agreed with them I was an idiot and laughed too, and they just got quite confused and left lol.