Sounds familiar. I was pushing a 61 chev with my legs setting on the right finder of a 48 Dodge. We had no tow rope. Once the Chev started going it pulled away, I could feel myself slipping all I could do was get my legs going fast enough to pull away from the car. II was going faster then my stride ending sliding on my knees with the Dodge stopping about two feet from me. Ripped me up pretty good. Young and stupid