Honking when the light barely turns green....

I don't know why, and if it's everywhere, but I'll be sitting at a red light, and the light will just barely turn green and the person behind me will honk. Like it's been less than 3 seconds and they will honk long and aggressively. Why? It's so annoying, are they that much in a hurry to get to the next red light? Jeez everyone please just calm down it's not that fucking serious. It makes me so angry.....