Run the lime wedge around the rim of a pint glass. Dip the rim into coarse salt to coat it well. Then, fill with ice cubes.

In a cocktail shaker, add the tequila, triple sec, and lime sour mix along with a few ice cubes. Shake until chilled and blended. Strain into your prepared glass.

Quickly flip the beer bottle upside down over the glass so that the beer slowly pours into the cocktail. This creates a layered effect as you drink. Garnish with the lime wedge if desired, and serve immediately.