Wrong place, wrong time. The soul sucking death machines that usually guarded Azkaban were here, at Hogwarts. They were only on the look for Sirius Black, but you got in the way. With a snapped wand, and you could do is run.

A horde flew after you as you ran through the woods, the eerie chittering getting close until - A shout. A flash of light, Beamed right into their faceless hoods.

Alex had heard you were in trouble, and came to help you.