Well simulators break just as often as aircraft. Fixing it is usually a case of rebooting the 'puters. But very occasionally, with the use of a harsh manuever, it's possible to get the simulator to, essentially, fall over.
Then you have a crash on the inside and a crash on the outside!
Only happened to me once: Dunno what happend but it threw a bit of a spaz and left us hanging very nose down whilst the visuals inside were showing a steep turn to the left. Rather an odd feeling