Thumping sound coming from egg

[spear41670]

Day 22. Others have hatched. There is a pip i heard chirping from the chick only twice over about 10 hours. I had it close to my ear and can hear a heartbeat like noise. It goes twice like bump bump......bump bump. What is going on

 

[Egg Snatcher]

It's pecking the egg to get out. The chick is starting to zip its egg