[GAMEPLAY] Annie Q (Disintegrate) Randomly doing double damage

So I was playing ARAM for fun (you can check the link for details) and a few times during the match, I would get absolutely CHUNKED by a single Annie Q. Like, double damage chunked. I tried to get screenshots of the death recaps for proof, but I apparently don't know how (f12 is screen cap on Windows 7, right?)

To clarify, I once took a disintegrate from her that did 1211 damage. There is no way a single Q from her should do that much. Before you say "oh maybe you took 2 Qs", I was fresh from the respawn for that one, full HP, and annie (along with her team) blows me up at once. I don't know what causes this, but this can be absolutely gamebreaking if she gets a double damage Q at the right time.

I hope a red will look into this, I wish I had video or something of this occurring, but this gives a whole ton of new ammo for the Annie QQers.