Suggestion was in reloaded server 

 I remember the butthurt.
I dont know...Maybe not a power foot? 
Maybe some sort of kevlar+polymer prosthetic exo-skeletal thing....With springs! 
How would one run in a single powerfoot? What kind of/how much fuel does it consume?
Thinking about it, its kinda silly and I don't mean fallout silly. 
Just straight up logical nonsense...I like it!
Again though, maybe a pair of protectics that grant some sort of speed bonus but also a malus trait like... 
"Unbalanced" = Greater chance of KD from any weapon.
"Fragile" = Leg shots have chance of breaking/disabling them only allowing the user to walk until the item is unequipped.
The whole thing is a funny thought.