why not use your turn signals

So I was driving home from school today and it's lightly raining outside. I hate light rain because it's really slippery. To add to that, my tires are bad and my car is rear wheel drive and it seems to slip out often. So when ever the weather's like this, I tend to drive really safe because I'm paranoid. So I'm on route 42 going about 65 on the fast lane, while this dumbassssssss car just cuts in front of me without even signaling for me to beep at his dumbasss!! I don't even hit the breaks because I know I would spin out if I did. So I swerved over to the middle lane while beeping the crap out of him. You shouldn't flip anyone off, but I flipped him off. He knew he was wrong because he didn't even look at me and trailed way behind. That could've caused a horrible accident all because he didn't use his turn signal. So never should you ever forget to use your turn signals. Especially on the highway on a cloudy rainy day turning into the fast lane! :)