when you accidentally, in the middle of a lengthy debug session, press F5 instead of F10.

When you are making great progress in Fallout 4, and accidentally hit F9 instead of F5.

@iAmNaN Haven't played Fallout 4...or, for the past few years, hardly any other game neither for that matter. Save for a few random sessions of games that my 4 yo son asks me to join him in, such as Roblox, Snail Bob, Red Ball, The Sims 4, Trollface Quest, Wipeout and similiar :)

@TerriToniAX F5 is quick save and F9 is quick load. Great way to wipe out progress when the wrong one is hit in a monumental brain fart. 😊

@iAmNaN *LOL* That F9 definitely sounds like a user-friendly feature. !