You're standing next to a vehicle and you're about to open its inventory. But suddenly it drives away! The “Inventory” action disappears from the action menu in an instant and instead “Simultaneously denote all of the world’s atomic bombs” becomes selected just as you hit space… what a great shame that all of humanity should finally end in this ironical way. Ironical and preventable!
When actions in the action menu become unavailable instead of disappearing and sending your selection down to the next in line they should simply turn a darker shade and become unclickable until the menu is closed! If they become available again they should light up again and they shouldn’t be cleared until the menu is entirely closed and opened again. So many mistakes prevented!