If you didn’t read my dupe post, holding enter and opening either the leaderboard or your inventory can lead to very weird things, including duping items, but also has some side effects.
Whenever if you are laggy enough, you can enter interact to buy a speed upgrade on the other team’s side in Capture the Flag, and before gimkit syncs client and server, you can enter interact the upgrade and buy it on your side after you’re tagged.
You can also enter interact almost everything, to be fishing twice simultaneously, or do other weird things. (Click + enter on same frame)