I've never, ever been able to figure out how to do the Sheldon/standard roadie mount where you stand over the top tube in front of the saddle and somehow fly up and backwards and land on the saddle. I know how it's supposed to work, I can't physically figure out how to do it.

Am I right that I have to somehow figure it out if I want to captain a tandem?

Anyone who struggled with this have any tips? (Please, don't point me to the exact same video on Sheldon Brown's site. I know what the move looks like, I know most teenagers can figure it out in thirty seconds, but I can't. If it was perfectly intuitive to you you probably don't have any helpful tips -- I'm hoping to find someone else who couldn't do it and figured it out to tell me HOW.) The main issue I have is that I can't figure out any way to get myself up off the ground with my foot that far behind me (on the pedal turned to the forward horizontal position) -- my weight is well forward of that foot, and I'm not strong enough to actually lift myself off the ground via only my hands on the bars, nor can I jump high enough to get up above the saddle.

I can do the corresponding dismount, since that doesn't take strength. And on my single bike, since I have plenty of hip flexibility, I can stay in the saddle with a toe down on the ground with my saddle at the correct height, at least on a road bike with a road-bike height bottom bracket.