I mean I can lift my entire bodyweight with just a couple of fingers, but that point aside, this isn't so strange. The bench presser stalls exactly when their m

I mean I can lift my entire bodyweight with just a couple of fingers, but that point aside, this isn't so strange. The bench presser stalls exactly when their muscles are just short overcoming gravity, any extra force--even a couple of fingers--will add upwards momentum. You're not often in this kind of stall condition when climbing, it is much more about leverage and transplanting force through the kinetic chain. Especially since we were discussing balance on typically lightly overhanging flat walls.