http://qs1969.pair.com?node_id=286883

Here's a nice piece of code:

(NO! Don't run it yet :)

$a=$b=$c=1; $a=$a++ + $a++; $b=$b++ + $b; $c=$c + $c++; print "$a $b $c\n";
Meditate a while.

Run the program.

Now, could someone please enlighten me? =)