Used the A/B on a Tucano to deliver Mars bars once. We were doing the 'Location Exercise' part of the junior course's survival training and we thought that once we found them, they might appreciate some treats. So we lowered and raised the A/B on the hand pump, making sure there was a good selection of goodies trapped (remembering not to test the A/B after start). We found the survivors OK, then set up for a run, flicking the switch at the approprite moment.
One thing we failed to appreciate was that a long transit at altitude had frozen the Mars bars rock solid and they had taken on the same properties as a 30mm ball round! They did find a couple - but it took some digging!
Good job my aim was lousy!