I'm not sure about how many particles of anything are in a picture, but I will say, there are many, just as you would see in any painting or portrait or whatever.
...Oh wait, you meant "in particular"?
Well, I like the one where Ducky faints after finding out her same ol', same ol' voice actress is back for the next movie (seriously, I'm surprised the "acting friend" thingy I made up happened only once...just saying), as well as my continuation of the caption where Ducky sees that Petrie had relieved himself in the water, then farts in it.
Heh, if either of the characters actually had...um, potty trouble, it wouldn't matter to me; I'd still be their friends all the same.
Pop culture references don't hurt either. I can't name any you've done in particular, but I would like to see some more of those, among other things, in future captions.