I Had A Male Friend Try And Crack My Back

I had a male friend try and crack my back last night and I was standing facing him with my arms crossed over my chest and when he pulled me forward and upward all you heard was crunch crunch crunch and it knocked the wind out of me for a minute. Now today I can't bend forward, pull my pants down to go to the bathroom lift up out of bed breathe laugh or cough without extreme pain