Excercise is goooood. "Popping" depending on where in your forearm it's at, could simply be a tendon rolling over a joint. We're cops, not doctors, but tendon movement can be painful when repeated over and over. You should have your parents get you to a doctor to make sure it's not something bad. Don't screw yourself up permanently....
Of every one hundred men, ten should not even be here. Eighty are nothing but targets. Nine are real fighters, and we are lucky to have them, for they make the battle. Ah, but the One... One of them is a Warrior... He will bring the others back.
"Wrong door, buddy!"
Let no man's ghost say my training failed him.