I had Just got done running a couple of Eclipses, I Went from 100mph to about 10mph to make a u turn and when i came up to a stop light, all this smoke goes by my passenger windows, so i pull over the car in a gas station and all this smoke is coming from my rear passenger brakes(Rear disc brakes), it smells really horrible like really hot metal,melted rubber and plastic all combined. I looked at the brakes, there was still plenty of pad on the brakes. the smell was really familiar but i couldnt figure out where i've smelled it before. Need Help! I Have No Idea what could have caused this!!

I Just got home and worried, I hope nothing serious! Need some suggestions/anwers/anything!

Thank You!!!