[barend]

so if you go back in time before you learned how to swim they'd come in handy?

if you went back in time and your mind didn't, so you forget how to swim, you'd probably forget that you'd travelled back in time - now before i get into the paradoxical repercaussions of what has been said let me just say that i think your refering to inner-body quantum leaping, in which case you still won't forget how to swim!!!

floatational devices, are insignificant to the esentiallity of a good comb and hair styling products (to help you blend in).