<human>: I was driving on a 4 lane road (2 each direction) during lunchtime, downtown yesterday. This guy driving a box truck with a company name and phone number on *all 3 sides of the truck* in pretty large letters, decides he's going to switch lanes, several times, without using turn signals, and rather abruptly. 

What put the icing on his cake was doing so right in front of me, less than 5 feet off my front bumper, cutting me off, this was the last straw. 

I very politely called the number on the truck, described the location and what had occurred, and told them I thought they might want to know the guy was driving like that. I was nice about it, said "I didn't want him to get in trouble and all, but figured he was just trying to make a delivery, but better to be a bit late than cause a wreck, and figured they might like to just remind all their drivers to remember to use their turn signals". The person I spoke to sounded very interested in hearing my report of the driver's behavior behind the wheel... 

I bet this guy will get a personal lecture. I'm for second chances... a good scary wake up call is sometimes really deserved, like that guy needed. I imagine he'll just get a good scare, learning someone called... and be more careful in the future.

Can you condense the text into a few key points?
<bot>: don't drive stupid when there's a phone number that will get to your boss on your truck, you might not like the surprise waiting at the office when you get back.