A long story, but yes, I did get to fly the Mars, and yes, that was me flying in this particular picture. I had just completed conducting two proficiency checks on the company pilots and they were very gracious to let me have a go based on my previous PBY background. The load is centered very close to the Centre of Gravity, so when dropped, the aircraft does not so much pitch up, but actually balloons up. In the case of the Mars you are dropping approximately 60,000 lbs of retardant (7,200 gallons) if memory serves. The ballooning is significant, to say the least, but way fun! It does require a healthy push to avoid excessive altitude gain, taking care not to exert additional negative stress on the airfrafme.