Drunk in the DTs came in to ED, punched an ED nurse in the face, had to tazed by the police before they could get close enough to him to restrain him and sedate.
When he came to the floor, he became agitated, and I have more ativan. As we were undressing him, a HUGE pocket knife with a curved, partially serrated blade fell out of his pants. Thank goodness he didn't have the frame of mind to remember he had that with him, or it could have gotten very ugly in the ED and upon admission.
Another time I was going through a suicidal, homeless man's belongings. I had on gloves, and I was holding the trashbag open and reaching into it. By pure luck, I grabbed the barrel of a syringe with an uncapped needle. When I asked him what that was for, he told me that he and all his friends use it to inject whatever they can. Holy crap. From now on, if I'm going through belongings, I dump them on the floor so that I have a better visual. I totally could have stuck myself on a dirty needle used by half of the homeless guys under the bridge.
I've been punched, kicked, threatened, sent to the ED for films from a kick to the head that made me see stars, but those instances weren't as scary for me as the two I mention above.