And He Does A Lot (like The 'casual No One Is Home Wear' Pose He's Doing) - Tumblr Posts
In 'The Clothes Don't Make The Turtle':
Leo's just casually vibing with Don while Raph was stressing out.
when Raph asks Donnie (who's still vibing) after another transformation scene if he's got any ideas on what could be going on, you can see how confused Leo is too till Donnie says "less talky talk more groovie groove", and you see it hit him,
He swiftly turns to the speaker, the dots connecting,
Where they're all looking at the box confused, worried, or a mix of both, and then you have Leo there looking at it suspiciously before realization hits him,
This also told me a lot about his character the first time I watched it, because even though they were all catching on (and did at the end) Leo was the one who felt it first, and all because he noticed how the music kept distracting his genius of a brother, because that's all Donnie talked about the whole time they were under the musical spell, how the music was basically "taking control".
It just showed me then how, even though he does good a lot, smart Leon actually is, because he does the joking (his coping mechanism), and the one liners and such, anything to make his brothers laugh
How much attention he's actually paying to everything around them.