Actually thats kinda true cause the hair is heavy and might make you break your neck when doing hair whip xD
And the funny thing is,is when a princess with long hair (Rapunzel obviously ._. xD) doing a hair whip XDD
HOW YOU COULD ALSO POSSIBLY BREAK YOUR NECK IS THAT YOUR HAIR WON'T FLIP BOOTIFULLY SO YOU DO IT EVEN HARDER AND IT RESULTS A BROKEN NECK!