TF Theater

Men get lobster power'ed suits but one malfunctions and gets baby lobster powers...and shrinks to the size of one and has a suit that ressembles a baby lobster. He goes through the life cycle of a lobster

Kind of surprised this hasn't been posted before now, since technically this could be classified as a flashforward/flashback/AP and return to normal AR. Hopefully this doesn't spoil the show for anyone who hasn't seen it yet: Reuniting after 20 some years, the characters Will and Grace go to a bar, take shots, and return to how they look in present time (aka the show's finale).

Baby with man's head, man with baby's head

Music video of a band performing with younger versions of themselves.

Man mentally goes back and forth through time

Not really sure how to classify this one, seeing how the two parents are already regressed when the commercial starts.

Elderly as teens; children as old folks