Before we dive in to the drink, who is Harvey Wallbanger you may ask? Well, according to historian David Wonderich, he was probably just made up to help sell Galliano. The many stories around the drink's inception were revealed to be fictional, the work of advertising executives who wanted to tap into the "California cool" vibes of the 60s in order to sell more bottles of the key ingredient. Those executives took the classic Screwdriver (vodka and OJ) and added in their new product. The resulting concoction adds some sweetness and some bitter, making the drink a little more complex.
The Harvey Wallbanger was one of the first drinks I learned how to make when I took an online bartending class. The class was a joke, and the key learning for the series seemed to be teaching prospective mixologists how to build complicated drinks with naughty names. A Screwdriver in a highball glass becomes as "long screw." Add some sloe gin, and it is a "sloe, long screw." Add some Galliano (making it a Harvey Wallbanger with a sloe gin float) and you have a "sloe, long screw up against a wall." Southern Comfort makes it a comfortable screw, and so on. Apparently this bartending class has a dirty mind, but this was the language for call drinks before the cocktail revolution.

In a mixing tin, combine the following:

1.25 oz vodka
3 oz fresh orange juice
0.5 oz Galliano
0.25 oz Jalapeno liquor*
Shake over ice, strain into a cocktail glass, with an orange peel garnish.
*We used Journeyman Humdinger Jalapeno, but any spicy spirit will work
I hope you enjoy your Harvey's Firecracker! Up Against a Wall or otherwise!