WILLEM JOHANNES VAN DER MERWE
The canister would first be thrown into the combi as soon as the combi came to a halt.  The idea was that in the pandemonium which would ensue the moment that the combi came to a halt unexpectedly, in that moment of confusion that the canister would be lobbed into the window, in that period it would be too risky to first talk and then throw the canister because if they decided to shoot it would be far too late.
	If I may add, we relied absolutely on the effect that the grenade would have, in other words to persuade these people that they shouldn't put up a fight and that they would be in such a dazed situation that they would be persuaded to surrender and be arrested.