Hmm a convoy hey - seem to remember a problem with one of the trucks in the famous song. I take it you had showered that day
so maybe it was that crate of hogs you had fastened to the back rack with the wind blowing in the wrong direction "It was gettin intense back there" as they say.
Or maybe they just fealt threatened by your really cool bike taking attention away from theirs. Jealousy is a terrible thing.
