I've personally seen them do things WAY beyond what I describe in this post, some so far beyond what most people would think is technically possible that simply describing it (without proof) would come off as highly-delusional to I suspect most of HN's readers/users.
So despite "they benched 800 pounds" seeming as "You're jumping to conclusions, go see a doctor" material to you, you're talking to someone that has seen them bench 3,000 lbs. (as an analogy).
NOW who's "jumping to conclusions" about what happened and whether or not this was technically-feasible?