system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why can we randomly feel our pulses in parts of our body for a few seconds?
gpt
Your arteries are pretty close to the surface in some places, for example behind your knees. If you put pressure on them or your heart rate goes up or a couple other common things happen, you can feel them pretty easily. For example some people's toes will start bouncing from the pulse in the back of their knee if they have one leg crossed over the other for a while, pressing into the back of the top leg. Remember that a pulse is just blood suddenly going faster in an artery because of a heartbeat, so it makes sense that wherever your arteries are close to the surface you can sometimes feel them.