Wings. Giant eagle wings, or something visually similar, permitting me to fly.
I imagine it'd give me some great muscles on my back/chest.
...I should probably just take up skydiving.
Or to extrapolate my desire further: Being able to turn into any animal (including any I think up, like mythological ones or custom mixes), but still being able to retain my regular mind, and being somehow able to vocalize human speech. I think it'd be amazing to run for a forest at high speeds as a jaguar or wolf, or fly as a bird.
Plus if I wanted to rob a bank, I could always disguise myself as a *different-looking* human, or just maul people as a bear. Or turn into something small for a quick escape (without the loot
).
It would pause time for everyone but myself and anyone in physical contact with me, and while paused ageing would have no relevance for those that aren't paused.
Completely implausible but cool. Think of the good and evil you could do with it...
Granted, but if you moved at all you would burst into flames (air friction—even the smallest movement would be ? kilometers per second, generating explosive heat through the air).
My usual "downside of freezing time" thought is... If time freezes, then light stops moving also, meaning you'd all be blind while time is frozen.