To give you a serious answer in case you were really wondering: nothing. Capsaicin stimulates the sensory receptors used for evaluating temperature and makes them react to temperatures under your body temperature. It tricks your nervous system into thinking the part is burning. It lasts as long as the intermediary protein used to transfer this information is available. When it’s depleted you just feel numb which what happened here. It all goes back to normal once capsaicin has been naturally eliminated by the body and the intermediary protein stocks are restored.

At the time, I felt that my fingers might be paralyzed and they would fall off.

Luckily, I ate the yogurt and they were saved.

It is a testimony to the power of fermented foods.

I find no fault in this logic, it's watertight!

Strictly speaking, it's yoghurttight.