@Khay if there no pain you should be fine.

@Aceysed10percent I can too, I've been able to do it for about 5+ years and for me I assume it's inflammation as well as poor posture.

https://www.youtube.com/watch?v=gkO0X8_05io

My sternum pop/ crunch vid. https://www.youtube.com/watch?v=CQrICa4hwVY

When I lay down and relax my head and neck I'll put my hands behind my head and pull up as if i was doing a sit up in a fast motion and feel me neck crack down to my upper back… The way I found out to do it, I basically just stumbled upon it bored and laying down... just wanted some feedback if others could do this too...