Emily's Cat
Rarely prone to hissy-fits
Yes, unfortunately it does. People don't always recognize when it does because it generally unwinds along a different path than it wound up, but it absolutely can and does unwind.
"generally"
Yes, it's possible, and yes it has occurred... but it's neither frequent nor common. That said, it's also not linear - there are dips and peaks along the path, but the path is still generally upward.