Having 1000's of Mails in TB (maildir or mailbox) in at least 5 accounts, then right click on a big folder and click "repair", when it starts to login (before s

Having 1000's of Mails in TB (maildir or mailbox) in at least 5 accounts, then right click on a big folder and click "repair", when it starts to login (before synchronization of header starts) remove the Ethernet cable (no other connection shall be active) click around in TB in a frenzy manner (go "offline", try to repair again, open menus etc), and see your TB freeze then your X11 session, sometimes if your lucky the system crashes (works best with intel GPU's..the crash i mean). The slower your imap the faster the freeze, Gmail works best.