Special equipment: a scorpion bowl and 6 straws, optional (see Cook's Note)
Combine the guava juice, pineapple juice, passionfruit juice, dark rum, white rum, gin, lemon juice, vodka and grenadine in a pitcher and stir. Pour into a scorpion bowl filled with ice and add the cherries and pineapple chunks. Add 6 straws. Pour the 151 rum into the shot well of the scorpion bowl and carefully light it on fire. Serve.
If you don't have a scorpion bowl, omit the 151 rum and serve the cocktail in a pitcher or punch bowl.