I saw these around town. The first one is obvious if you've seen Superbad.
This next one is a little more subtle:
So FF0000 is the programming code (hexadecimal) for the color red! Thank goodness I knew that so I could get the joke and snap a picture! Also this is my first blog generated by sending an email with pictures from my iPhone dirctly to my blog - hope this works!
Sent from my iPhone