An event that requires a minimum of two people, a vehicle, and a shopping cart. While one person drives, person two hangs out of a passenger window and holds on to the grocery cart. At the passengers command, the driver turns opposite to the side opposite of the gocery cart and the cart is released slamming into whatever object is desired.
The practice of leaving a message in the sand to be washed away with an incoming tide. Best practice involves writing the message at outgoing/low tide to ensure maximum viewing period.