I just thought I would share this story. I have to take a break from reading the FAR/AIM.
Today I went to the Airport to take a final prog check with my instructor to get signed off for my Checkride. There was a 2000 ft cieling and 14kt winds so we didn’t go for that, but after talking about the Oral exam for a while, I decided to go do some touch and goes.
I made two great short field landings and went around for another. As I was abeam the numbers I pulled my throttle and went to pull my carb heat and the whole knob came off in my hand. It was like one of those movies where someone pulls the break and the handle breaks off. I was left with a knob with about 6 inches of cable hanging off of it 
. It was 80 degrees and I was at 1400 ft so I wasn’t too worried about carb ice, but it was amusing nonetheless. The worst part is now the plane is grounded until it gets fixed, and the other 172 has a cylinder out, so my makeup flight for tomorrow will have to be rescheduled. I work in retail now and its getting to the time of year when rescheduling is not easy.
Karma has not been my friend lately. I’ll have to go help an old lady cross the street or something.