Will i feel anything during an arthroscopy on my knee?

You shouldn't : Knee arthroscopies are done with sufficient anesthesia that you shouldn't feel much of anything during surgery. The procedure can be done under general anesthesia, when you are completely asleep, a spinal anesthetic, where your legs are numb, or local anesthesia, where you won't feel pain but might feel pressure in your knee. You should discuss your options with your surgeon, as preferences vary.