I do agree with the previous poster response to your question. A letter to his attention about his actions would get him straight, but also get him to sign it and give him the copy and you keep the original.

Also, record any of his insults to you in writing. Your written words are much more of a defense to his verbiage when he faces his superiors.

If his actions do not heed, then you need to take this to HR. As you stated he's already in disciplinary action for his behavior, that should give him a wake up call that is grounds for termination.

Although you do not want to be a person to get a person fired from their job, which I applaud you, but irresponsibility towards co-workers and customers are not allowed.

As far as pay leave, you are not allowed that unless it is more of a stressful situation.

I would draft an e-mail to him letting him know that while he thinks his behavior is humorous, you do not find it funny and would appreciate him to stop behaviors, such as (list behavior). This way it's in writing, he knows you are serious and you have not let a supervisor know yet. Which may maintain some sort of friendly relationship in the event he is just immature and doesn't know better. If the behavior continues, then you can forward the e-mail to a supervisor and file a complaint. I find putting things in writing always helps!

Yes that is bullying and he assaulted you by throwing something at you. Report this don't let it go it will get worse. Nobody is allowed to throw things at someone on a job.

This is totally unacceptable behavior! Talk to your manager about it! Don't be afraid. You have a right to work in a comfortable environment! Good luck!