i think kylepotatoes has a hand crank on his. and yes there is always a way for anything, just be creative. it would probably be sweet if u get stuck in a mud hole.
Theres a couple places i like to ride that have a very steep short inclines that are impossible to ride up, any attempt will make you flip (ive tried). That and theres sometimes just "those situations" where one would really come in hand, especially when your riding alone.