The EVil within

I've been feeling the darker side of me taking over lately. Few days ago, i almost caused a bike to crash into me and when the guy showed me the "finger" and instead of showing the "i'm-sorry" hand, i showed the thumbs-up.... that guy was so furious that he almost got down the bike to hit me but the thing is... ... i'm not even worried about that during that instant. I was still cool about it and not even feeling guilty about almost causing an accident. I root cause it to two items that contributed to me acting this way.

1. There was a bloody car parked on the road which took up 3/4 of the 2nd lane which i've really gotten SOooooo fed up with;
2. He showed me the "finger", if he were to show the "WTF" or the "WTH" gesture i think i would have still say i'm sorry..

At another incident, i almost lashed out at my colleague for a small issue that i've almost and nearly accepted and i still don't know why i reacted the way i reacted. But the fact that i reacted is that i still unable to totally accept it right?

Was kinda wondering... ... what cause me to have my dark side appearing ?? stress?? i wonder... ... ... ...