Temporary Spray Paint on my friend's truck - Prank

One Sunday last summer, we were drinking some beers and working on a friend's truck. We sent him to the store to pick up some parts & more beer. We didn't have anything to wrench on until he got back (I live in the boonies) so we cleaned his truck and did some painting to kill time.
First we painted the air box Ford Engine Blue, then had a can of Dupli-Color Car Art Temporary spray paint that was almost the exact same color blue and painted a somewhat crooked stripe on the hood.
I got the flip camera out when he was getting back to catch his reaction:
http://youtu.be/_I0gKq3leno
First we painted the air box Ford Engine Blue, then had a can of Dupli-Color Car Art Temporary spray paint that was almost the exact same color blue and painted a somewhat crooked stripe on the hood.
I got the flip camera out when he was getting back to catch his reaction:
http://youtu.be/_I0gKq3leno