brake question?

Yesterday was a rare nice day here in Virginia Beach so me and the owners of the shop I hang out at wanted to go for a drive and hit up a mustang show, so we get on the highway and play around (they both have 600+ hp Cobra's) well they play and I just try to keep up... it didnt work :nonono: anyway to get to the point I had to keep getting on the brakes pretty hard (traffic,red lights) well we get to this one light any they have the line, they take off :hail2: I try to keep up but once again have to get on the brakes this time hard cause I was going about 100 well when I stopped smoke started pouring out of my front tires so I pull off and give them a sec to cool down... what might of happened to my brakes? anyone ever done this before?
 
well as you know, they got hot! seriously, if you dont have any vibration goin on now(when you hit the brakes), that you didnt before, i wouldnt worry about it. atleast check the pads tho, dunno if its possiable for them to get hot enough to crack or not.