Anyone can do 80 pushups in a row if they do three sets of 20 pushups in the morning, three sets of 20 at night, five days a week for 60 days straight.
I completely agree with this; I used to be able to do a solid 75 in a row no problem. I wasn't even working out that hard, although I did have to build up to that point by making pushups a part of my exercise. I'm sure I could get back there if I tried.
And I really should! Thanks for the encouragement. I'll certainly have the time for it, since I quit D3 a week ago, and am taking a leave of absence from videogames overall.