First of all, the patient should be relaxed. Okay? Any tension in the muscle, and the reflex won’t be present. They have to be totally relaxed. Second of all, keep the joints at 90° as much as possible. Doing the biceps like this is not adequate. Ninety degrees, everything is ninety degrees and relaxed so, sometimes I like to distract them and talk about other things, you know. How about those Dolphins? Or something like that. But here I am, I’m putting my thumb on the tendon. I can feel it. I’m hitting my own thumb and I have a biceps jerk. Of course, on the other side, I like to put my arm under here. Let him relax. I can feel when he is relaxed on my arm. I put my thumb on the biceps tendon again. I’m getting a reflex. Okay?