Face flushed with Push Ups

So I'm waiting for an update from a tech and ask myself "how many pushups can I do in a row?".  So I started cranking and my face started getting warm...then hot...then "WTF" so I stopped.  It's cooled off now, but I have never had that happen before.  

BTW, the answer is 20 and probably could have done more but that sort of scared me off anything more than that.  

A couple years ago scott (not me) posted a link to a site that takes you from your current level and says that you can do 100 straight. I believe that Bill got into the 70's and within the last year, I got almost 50. You could be the first!

Yeah, I've got the app on my phone.  Got into the teens but gave up on it after a while.  Would start again except this scared the crap out of me...

i actually made it to 85 in a row.... but gave up on the 100 after my other training became more importatnt.  today i normally just do 6 or 7 sets of 40 pushups during my chest/tri strength workout.  hitting 100 still would be cool!