Temper

Here's a good reason to post: my boyfriend has a terrible temper. I always sort of knew this, especially since last year when I saw him fly off the handle. It's scary when he gets angry, he's a big guy and he's strong. I'm not sure if it's getting worse, but he was fired from one of his jobs the other day because he got angry on the job and made it obvious in the presence of one of the bosses. He also has pretty bad road rage, and the other day he got pissed at another driver and made his point by gunning the engine and zooming around curves in a way that wasn't safe. He immediately put his hand on my knee and apologized when he saw I was upset, but still. My instinct has always been to let him have his space to be angry, but I'm a little concerned that the anger is having a detrimental effect on his own well-being and safety, not to mention the well-being and safety of others. The last thing I want to do is be a nag, but if we're going to get married this is something I can't let slide. I can handle it for the most part (except for the driving, I can't handle dying in a car accident) but I don't want my children to have to deal with or witness it. But how do I bring it up without making him angry?