Well, then he was trying to race you, and would have probably won if he jumped a lane on-throttle. It could have had a supercharged v6 camry engine. Look up those on youtube for some track videos. I wouldn't want to encounter one.
Otherwise, if there were more than two people, you can almost guarantee these days that one of them's got their damn phone out and is recording it. They want to hear you rev, or race you in their sleeper with a kill video. I've seen sleepers like that going out and hunting for exotics to take down on camera. Can't blame them really.
