My friends and I always wanted to make a "Random scene movie". It would kind of be like Robot Chicken but real life with just fucked up random clips and segments.
Opening scene,
Man walks storms into a pet store, obviously in a hurry.
He walks up to the checkout counter.
"What's the cheapest thing you guys have?" He asks the desk clerk.
"Well we have these little dog cookies, or these keychains that you squeeze and they poop." She replies.
"The key chain is perfect!" He slams an envelope on the desk and pulls out a pen.
"Happy Birthday Grandma" He says through gritted teeth.