You also need a sympathetic troop at the controls of the tank.
I don't know if sympathetic is the right word. A tank commander would have to be unbelievably hardcore to order his tank to crush his fellow countrymen who stood in his path. Whether he was sympathetic to their cause or not, I'd think that would be very hard to do.
Better to die on your feet than live on your knees.
If this possible bouncy actually happened, I would love to talk to this guy and find out if he does see through the facade or he just needs another dose of hopium to get his catatonic state of stupid...