I was a line boy at an FBO during last two years in high school.
Fuel airplanes, polish, sweep the hanger, ...
One year during an especially hard fire season, I was filling up DC 4's and 6's as these were the predominant fire retardant droppers for SIS-Q (the company name) there was even a boxcar with a little turbine mounted on top between the radials, apparently running on avgas.
I was driving between the fuel tank and the bombers all day long, the bomber crews telling me to put 150 gallons in each tip, 200 in each root tank, 15 gallons of oil in the #3 engine, stuff like that, when a small taildragger (but with four engines) landed and put in his order.
Our usual faire were Cessnas and Pipers but I quickly got use to selling 400 gallons at a pop rather than the 100 gallons on some bizjet, or 25 gallons to a student on his cross country in a rented C-150.
I had a friendly competition with Charlie, the other line boy, at the same FBO as to who could deliver the most gas, so when this little a/c came in and asked for 75 gallons in each root and top off the tips, I was a little envious of my competition delivering twice the fuel to a 4 or a 6.
When I finished, and was reeling in the hose to the truck, I looked back at this little puddle jumper and realized I had just walked on the wing of a B-17.
I was disappointed with myself that I had been so caught up in the fuel delivery that I didn't appreciate the old warhorse while I was fueling her and I may have lost the gallonage competition that day but Charlie didn't fuel a legend.