Click the image to see that LJ post.
Well, here's what happens when they go KAPLOOEY and erupt! Beauty from destruction:
Click the image to see NASA Solar Dynamics Library page - with a video!
The filament stretched and arched upward until it broke and blasted off into space. Some of the plasma from this eruption hit Earth with a glancing blow on September 3, generating some beautiful aurora:
Click the image to see a Daily Mail news article about the event.