You looked at some guy on a treadmill trying to hit on a nice young women trying to ignore him. Thinking that the guy was rude he would make a decent test subject. You willed the man to regress and the man quickly turned into a teen, then a boy, a baby, and then a woman materialized where the baby was pregnant. Willing it a little further her belly shrank in a bit to looking mostly flat but you could still sense the male in her. You then realize there was a kind of switch for the male and you flicked it and sensed the male was now female. You then progressed the fetus into a baby and then kid who was wearing a dress and watching her mother chat with the young woman.
Her mother said "Sweety, go to the daycare. You shouldn't be around here."
the young girl nodded and then started to sprout up into a young teen as her chest started to push out to B-cups and then asked "But I want to exercise to!"
her mother responded "You are still too young, this place doesn't let anyone under 16 exercise and at that point you need my permission. The equipment here can be a little dangerous."
the young girl then aged to young woman as her hips and butt flared out further and her breasts became a D-cup. You then kept aging the woman as her skin started to sag and wrinkle. Then her hair started to grey, and then you aged her faster and faster and then she became dust.
You thought "Well I just murdered someone... Well i'm a force of the universe so not the worst thing I could've done." you look over to the woman who was once a mother and then thought "what'll happen if i do that?" and then the mother started regressing into a teen, then girl, then baby, then her mother was on the exercise machine pregnant. you thought "faster" then the woman's belly flattened and the woman herself regressed into a fetus in her mother. Then in a split second that woman followed suit. You watched and saw generations regress into themselves and noticed that they started looking different. You stopped and noticed that the woman who was currently pregnant with the last one was a neanderthal. You then continued rewinding and saw the forms shift and change till the pregnant organism wasn't pregnant since they were too small to see with the human eye and reproduced via division.
The woman on the treadmill had stopped awhile ago and was just watching as evolutionary history passed through her eyes. Having almost no idea why any of it happened she looked panicked. You decided to...