I use FeedDemon as my desktop newsreader and today, while looking around the UI I found a strange menu item: "Hit the Panic Button!".

The button doesn't have the "..." that usually marks menu items that open a new dialog before doing something, so it frightened me a bit. But I finally decided to click on it and a dialog appeared:

It's a really interesting feature: when you go on vacations and you come back and see 10k unread items, you just hit the Panic Button, and you are back to only one or two days of unread items. Cool, isn't it?