No one in the whole group was nice to you? Either you work with cold-blooded lizard people, or you just focused on the guy that was mean to you.

It is your responsibility to report a workplace accident or it would count against you. Say you found out your ankle was more seriously hurt later on, then they could totally ******** you about not reporting it. So this 'big' boss decides to be an asshole and try to intimidate you for reporting by suggesting you need to be tested for crap, no doubt firing you is a better option in his mind. He is never going to look out for you, you just have to accept it and look out for yourself as much as possible. Congrats on reporting the incident correctly, and I'm glad it was in front of witnesses.