ULTIMATE RIDDLE! can you answer it correctly?!?

2 people go up with their legs tied together (think 3 legged race)

get to the top where they now untie them and walk back down
 
Two people had one leg tied together on the way up because they were in a 3 legged race. When they got to the top, they untied themselves, hence walking back down with 4............................ honestly though, I have absolutely no idea!
 
a dog playing hopscotch?
i think?

or a dog with a broken leg going to the vet up the hill and came back down with the cast off.
 
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