The 1960’s Harvey Wallbanger cocktail, a modern day classic, has quite story behind it. It seems to be named after a Californian surfer who drank so many he literally banged and bounced off the walls. Maybe the orange juice made the drink seem less intoxicating so clearly don’t do a Harvey and drink responsibly.

1 measure vodka
3 measures fresh orange juice
1-2 teaspoons Galliano
orange wheels to decorate
6 ice cubes
straws
Put half the ice cubes into the cocktail shaker, add vodka and orange juice. Shake until frost appears on the outside of the shaker. Add remaining ice cubes to a highball glass and strain contents of the cocktail shaker. Float the Galliano on top.
Decorate with orange wheels and straws.

While researching this cocktail, I came across  this youtube clip, which tells a slightly different tale.

Proceed with caution, may cause wobbly legs and avoid walls. Drink aware etc.

Recipe and information from The Classic Cocktail Bible