i was at an idoc on chessy. i was on my ethy hitting the gray barrels (i stayed mounted so i could see where my toon was on the screen). the barrels turned and the crowd demolished an exterior barrel. i ran through BUT STAYED MOUNTED. normally i would be automatically dismounted. i also noticed there were at least a half dozen other pets inside the idoc.
i've only seen this once but apparently there is a glitch. i dunno, maybe it was server lag.