Someone needs to be medicated...

and no it's not me, at least not yet. I had a wonderful vacation, it was so nice seeing everyone, and it was much too short. We went back to work on Tuesday and I ended up having one of the worst weeks ever. I'm blessed to work with a handful of very nice guys, except for one of them who has been here a little under 2 years. He started when he was nineteen and behaves like he is 3. He has disliked me from day one. I know that sounds harsh but I'm not exaggerating. When he was getting walked around and introduced to all of us, the supervisor told him the B.C. (one of the good guys) and I were the to go to people because in out area we've been there the longest and we've got the most skill sets. As soon as that was said he went from insolent to hostile toward me. He's got to be one of the most unstable people I have ever met, example- one day he'll like someone (talk to then joke with then act normal) , then the next day it's like a totally different person, he doesn't talk to the person, glares at them and is just an all around weirdo. The first major incident with him happened after I was gone for 5months when my mom was sick. I came back to work and he was a total jerk to me, started going on about how it was better when I wasn't there and that I don't do any work or help out. Which is total CRAP!! The rest of my co-workers where thrilled to see me, the most detached of them all met me half way down the line and hugged me he was so glad I was finally back. If that isn't a testament to what I do there then I don't know what is. Anyway his behavior continued to the point that with the stress of my mom still being sick and him harping at me all the time I finally went to management. His accusations we discredited for a lack of a better word and he was slightly better after that. better is still not normal under any circumstances. So I've basically ignored the poor attitude since then. Well Thursday he totally went off on me. We had a small problem on the line, and I was going to show him how to fix it and he told me he could do it himself. So I went and waited at the desk, he finished "fixing " it and we started up, the problem was still not right, so I went to fix it, this is a basic printer problem, something I can fix with my eyes closed practically, When I go to start fixing it he yells at me not to touch that he's going to call maintenance. which was not needed. So I asked him why he was calling them for something like this? and he snapped and said he didn't want to take the chance that it would still be wrong, that I could screw it up. I told him I've been trained to do this, I have the skills... He then went off, YELLED at me "not to piss him off" well that's a threat to me in my opinion. Me being me I had to say something to him, I asked him if I was supposed to be afraid of that? and then he started ranting again about how I don't help out. This coming from the one who sits on his arse all day and does nothing. Long story short I emailed management and said if they didn't fix this I was going to be looking for another job because I do not need this kind of verbal abuse and harassment from anyone.
If you've read this far wow you must really be a friend , thanks for listening, I know that was a lot. and really I condensed quite a bit. I was really almost having an anxiety attack by the time he was done yelling at me, my heart was in my throat, beating a mile a minute and I couldn't breathe and my hands were shaking. I came pretty close to walking out. I have to say that this was the first time in my life I've ever had someone talk to me like that. It was a bit over the top and out of the norm for me.