From The 'Duh' Files - Again

Thrown eggs can cause serious eye injury :

Reuters - Tue Sep 26, 7:32 AM ET

NEW YORK (Reuters Health) - As many people gear up for their celebration of Halloween, which often includes pranks like throwing raw eggs at strangers, a team of UK researchers warns about the potential eye damage that can be caused by this practice.
[...]

Uh, really? You mean that if I throw something and it his you in the eye, it could cause damage?
I'll be damned.

Well, after a few minutes cogitation and some serious research (not), I have comprised a short list of other objects that could potentially cause eye damage if someone was to throw them at you:

• Water ballons
• Snowballs
• Bleach
  
• Footballs
• Acid
• Rocks
• Axes
  
• Lawn darts
• Javelins
• Bowling balls
• Rhinoceroses
  
• Automobiles
• 747s

So there you go. And it didn't cost you a dime.