Thread:Shadowfyrelord/@comment-26084195-20161012034938/@comment-26084195-20161022001558

Precisely. if you tried to stop someone travelling against the flow, not only are they moving more slowly, but you've also got the water working for you, in a way. Trying to stop someone going with the flow would be much harder. They've got the flow of the water working for them, which gives them momentum, and they may even sweep you up along with them.