Knock me down with a mugger : 1986 : Share A Capital Christmas, Capital Radio

Blam!! A sudden force on my back knocked me over in a second. No time to figure out what had just happened. I was sprawled front-down on the floor with a weight on my back. I shouted. People around me screamed. I could sense a struggle taking place overhead. The object on my back lifted and, from my ground level line of sight, I made out the feet of someone running ahead of me into the crowd.
"Are you alright?" asked one of the group of people standing around me, looking concerned.
"We saw that man push through the crowd," explained another, "then knock you over and jump on top of you. We managed to pull him off but he ran away."