I've been thinking that this phenomenon was iconic to Bangalore....
These are our "autos" ...auto-rickshaws, an inescapable, convenient, irritating, frustrating method of transport in our city.
The guy at the back IS pushing the one in the front, sometimes to a fuel station, sometimes until the auto in front starts its engine with the momentum. The foot is then withdrawn. I have never seen by what form of signalling the auto guy in front requests the help of the auto guy at the back...ESP?
I posted this on Facebook, and I now realize that every Indian city seems to have this great "auto-foot assist" method of aiding movement!