It's where an athlete uses up his glycogen stores and starts gaining energy from his fat reserves. Fat take alot of O2 to break down, which means a higher O2 consumption is required. However, the body enters a state of oxygen deficit where it cannot provide the working muscles with enough. This is termed as "hitting the wall".
dam
Dam
there an earthquake?
I have NO clue
say what
It means taken apart.
Perhaps he hasn't seen you in a while and said wow is that really here or maybe he wanted to say something but wasn't sure what.
No quebre la pared a proposito = I didn't break (sic!) the wall on purpose.
One more crack and i'll plaster you. That is the answer!
If you mean by pack a punch like hit someone, then you could say hit. But if you mean like intensity then you could say vibrant or intense or something like that. Hope I helped!!!
I would say to be an athlete
AS an English person I would say take a nap