1/3 oz of grenadine syrup
1/2 oz of sugar syrup (or simple syrup)
1 splash of 151 proof rum (or overproof rum)
1 splash of Triple Sec
1/3 oz of Mint liqueur
Combine triple sec and sugar syrup in a separate glass. Pour grenadine into a shot glass, then layer the triple sec mixture on top. Layer mint liqueur on top. Top off with 151 and ignite. If done properly the shot should look like a mexican flag on fire.