For me “How long could I get away with driving like an ABSOLUTE ASSHOLE all the time before I lost my licence or had an accident.” Speed limits, red lights, stop signs… forget them all. Every day I have to drive sensibly and obey the law because without my licence I dont have a job, and every day I see at least one person driving like an absolute moron and I wonder…
What happens when we reverse Earth’s rotation.
I’m fairly certain that there’s a What If video on this by the XKCD guy, Randall Munroe.
While interesting I feel that one is more “Hilarously impractical” than anything else.
I’m pretty sure an experiment that kills everyone would be considered immoral but we’d have to ask the IRB to be sure ;)