I have no idea how it even happens, she is a light rider and is by no means 'smashing' through anything. You should have seen the looks as we were walking it back up, total 'WTF' faces ha! Best part was we both were thinking in our heads this would be the 'last run' of our visit and didn't vocalize it to each other. Thank god this happened at the end of our time and it wasn't worse.