if you seen the movie Goosebump then you know what the Cuckoo Clock of Doom is about

you wake up and a baby body

*You can change your whatever life history you want with that button just type one in and press the button*

*body swap*

*you can change your life history once with the machine*

your body swap with a spoiled brat Caillou

time machine

the carnitrix is stuck on ben 10 risk and every time he fuse into an alien hes can't not in control the watch is now in control and killed Quinn and Grandpa Max in any transformation it's painful

*you're the blonde kid*

*you woke up and a different house and look down at your body and realize that you swap bodies with a special ed*

....

*body swap*