Well I was getting onto I-25 S from 104th Ave., it's a double turn lane to the onramp, I was in the right lane and a 4 door somthing in the right lane. The 4 door was your typical ricer, turn light turns green I zoomed on by and merged over, well the punk kid didn't like it so he darts through traffic and gets in front of me. Well all of a sudden white smoke pours out of the exhaust, so I'm thinking he blew his engine, but then it stop like nothings wrong. By buddy tells me he saw in some magazine a smokescreen kit that you can add to any car, so I figure this punk has got one. Well I figured I would let him know that I too have a smokescreen kit, set the box on kill got in front of him and leaned on it with a little pressure on the brake. Presto, nothing up my sleeve, punk disappears, didn't see him for the rest of the way to Denver. Sorry for the long post!!