I think its time I explained the joke in the 'Did you know?' thread...! ;)
Here we go!
Did you know? ...That if you say.... 'Orange'... really slowly.... it actually sounds like 'Gullible'...?
So what the joke does is make you think... Really? So you either say it out loud or in you head, to see if when you say orange slowly it actually sounds like gullible...
Say? You do know what gullible means, don't you?
Obviously when you say orange slowly it doesn't sound anything like gullible... more like 'orrrraaaannnggeee'
So therefore by you actually saying orange really slowly out loud or in your head, you are extremely gullible...! And the whole premise of the joke... Like I said, you may need a bit of brains for this one!
Another joke could be:
Hey! Did you know that the word 'Gullible' isn't in the dictionary??!!
When obviously it is... but a person who is gullible will be tricked into looking and check! ;)
Make sense? ;D
Actually.. I got it after a minute.... and I didnt say aloud "oooorrrraaaaannnnnggge" .. I knew right away that it didnt sound like gullible.. so thats why i said " What the hell" and "Do i have to remove my brain to understand this?" .. common sense should tell u that saying orange really slow wont sound like gullible

.... I just came up with the balloon thing for two reasons... one as a reply to u... and another so i could think about hearing people say "baaaaaalloooooooooooooooon"
Nick