Impossible Coin in Super Mario 64
youtube.com
youtube.com
It has benefits over real-world experimentation because the fundamentals of the system are known and everything can be observed. No messy approximations are needed. Most guesses can be confirmed. But then we still end up with an unconfirmed hypothesis about how the situation came up in the first place. Reasoning is presented but there's no way to confirm it beyond asking...the creators.
The tooling used to recreate certain game situations is like a magical testing apparatus that doesn't really exist in the real world.
Discovering how to gain enough speed to clip into modulo copies of the level is one thing, but extending that and finding surfaces that can deflect you in useful directions is a totally different level of commitment. (Also I'm curious how he managed to create the relative view--did he hack the ROM to fix that? I'm sure he mentions it somewhere.)
If you haven't done so already, go ahead and watch his Watch For Rolling Rocks .5 A Press commentary.
https://www.reddit.com/r/videogamescience/
And