I need some other outlet

Physics today was incredibly frustrating, because we have gone beyond simple stuff like just adding vectors to figuring out tilting our x/y axis in order to solve funky-angled problems, and I'm just poor at that sort of thing. So we came out of lecture, went to recitation (the TA session) and asked the TA, and she said, "It's just Newton's third law" and proceeded to point at a drawing and repeat that it was Newton's third law (without explaining which forces were in action or reiterating what we were looking for). I left the class ready to go punch someone, and the rest of the class looked ready to cry.

I walked towards thus bus and thought, "What will leave me de-stressed and not wanting to punch someone? I know, I'll knit."

I pulled out the second sock I've been working on and worked for another few inches... and discovered that the bottom of the foot, which should be smooth, was ribbed for some reason.

I stared at my sock. It stared at me.

I checked to make sure it was still ribbed. It was.

I have 8 inches of sock to rip out. Recognizing this was the straw that broke the camel's back. I came home, ate a sandwich, and squished my cat so tightly she struggled. Then I punched a pillow. Then I thought about the vector of force from my fist to the pillow and tried to figure out the total force in the system. I got an instant headache.

Maybe something that's not knitting would be a better outlet for my stress.