That just means you don't need a protein shake.
On Friday, I got a bug in the eye. It was irritating me, and for a moment I tried riding with one eye open, hoping the tears would naturally flush it out. But that wasn't going to happen, and I felt ... weird riding like a cyclops.
I don't know why bugs prefer the MUP to the road, but I'm actively avoiding a lot of trail sections when I can for this reason.