Rainbow Dash was your girlfriend and however she hasn't seem to be doing well. Getting a bit violent with outbursts. Coming back late. You noticed Pegasi have gone missing in Equestria and when they fail the flying test. So secretly one day. You some ponies fail the test and Rainbow Dash took them a locked off section of the Rainbow Factory. You entered through the vent and saw a machine other ponies called the Pegasus Device. You saw Rainbow Dash walking with the other ponies and sent them into the Device and it...killed them. Rainbow Dash heard something in the vent and played it off.

Rainbow Dash: "Oh well. I'm going on break. These failures will serve better as Rainbows then flying. However I keep hearing something in the vent so we might need to get that clean eventually. Either that or I'm hearing things but keep working."