Pour Tequila in one shot glass and the sour, lime juice, and triple sec in another shot glass.
Lick hand and apply salt to it. Hold lime in same hand. With other hand hold the first glass, with tequila, with your thumb and index finger and the second glass, with the sour mix, with the index and middle fingers.
1). Lick salt.
2). Drink from first glass as the second glass pours into it like a waterfall.
3). Bite lime