My friend and I wanted to have a snowball fight... He threw a mouse snowball at me:

Then, my avatar stopped showing up! I opened my HA image in a new tab and saw this:

I've copypasted the text of the exception here for the developers: http://pastebin.com/A3AAfP3F

The avatar returned to normal after the snowball "wore off" (went away because of the time limit)

If there's anything else I can add to help, please just let me know.

[edit] He threw another one at me, geez. Said he "just wanted to make sure it was reproducible"... Well, it was. ¯(ツ)/¯