Tears of a Clown. (WIP)

[Chutzpar]

The happy one doesn't look like she'd actually be able to stand up.
Her far leg's bent, so obviously the weight's not on that.... but her closer leg's leaning backwards, so she can't be resting her weight on that, either.
She's also looking really stiff!

I'm having difficulty bringing up any resources that explain this, so I'll give you an exercise.
Go stand in front of a full-length mirror. First, stand with your weight placed evenly between both legs - like you're standing to attention. It's not very comfortable or very natural-feeling, and it's also static as hell. Avoid drawing people doing this unless they're actually a soldier or something.

Then: shift your weight to one leg. What happens to the leg that's bearing the most of the weight?
What happens to the leg that isn't?
What happens to the angle of your hips?
and - and this is the secret part - what are your shoulders doing in relation to your hips?

In real life it's usually pretty subtle, but I've dug out some more "posed" photos that show what I'm talking about:

(durr hee hee a bum)
Note! The weight-bearing leg is stiff, and the hip is therefore raised. To counteract this, the opposite shoulder is raised.
It tends to be less noticeable in men because of differences in skeletons, but it still happens.

A REALLY IMPORTANT NOTE.
With a drawing or a sprite, you need to exaggerate poses somewhat to make them more readable. Basically, real life is boring - you're aiming to be convincing, rather than realistic.
On the other hand, if you push the hip/shoulder dynamic too far, everyone you draw will look like a stripper. So don't do that.