You guys obviously have a bad definition of easing. In case none of you have noticed, what jdavis made here has no easing nor flow at all. Easing is changing your speed gradualy from slow to fast and vice versa(key word: Gradualy)with consistency to avoid abrupt movements while flow is an eased transition between a move and another. As you can see, your spacing is inconsistent since it's sometimes goes slow, then fast, the slow again. In other words, things aren't organised. Also, physics is an important factor for good animation. When jumping, you're supposed to build up enough power to push your self to the air for a little while, and the way to animate it is by easing a bit before you fully stop then jump. As for the second jump and the fly thing or howere you call it was physically impossible. How could someone jump THAT far without enough momentum? Even huge amount of momentum won't let you reach that distance.
Forgot to mention that the sitting guy had to bounce a bit when he hit the ground.
I can fill you in with more details and flaws but for not, all you gotta care about is to animate decently, which means you're not even smooth considering the motion path isn't curvey at all.
Over all, assuming that you just started Pivot, you're alright. Just start a camping fire on the Darkdemon tutorial section since it has the Best Pivot tutorials out there because boy, you need helluvalotta tutorials before you start to practice. Hard practice.
I agree with most of what you said, except the 'How could someone jump THAT far without enough momentum?'. I've seen videos where the sticks just fly thousands of feet into the air. Momentum isn't taken very seriously, and if battles were realistic, there would be a a few punches or maybe one hit with a weapon. I'm not aiming for realism, they're stick figures. I'm just working on some easing. Anyway, thank you all for the tips! :D