You lose concentration when you start to wonder where
on Earth I could've found a wall of spikes, and your moon buggy falls into the third-biggest crater on the Moon. Where there is a floor of spikes. Your entire body is pierced vertically on one spike, stopping just before your brain. You are in excruciating pain, when your moon buggy explodes, and kills you.
Moral: if you want to work for NASA, come up with a newer and better
design 
I am.