I had a ball of mutalisks at the side of the map attacking protoss base and when I went to move away from reinforcements about 3 of my mutalisks became trapped on the outside of the map they couldnt move, and they got shot down.
I'm not sure what caused this but i just thought i'd report

Hi opkutty,

Can you please post a link to the replay? There are a lot of websites that will allow you to upload a replay.

Thank you for your report, this one sounds really interesting!