Add lime juice, syrup and mint leaves to a Collins glass and press gently with a muddler.
Add scotch and fill with crushed ice.
Float Campari on top and fill with more crushed ice.
Garnish with a flaming lime shell.
*Flaming lime shell: Squeeze half a lime, reserving juice for another use. Top drink with lime shell and place 1 sugar cube inside. Douse sugar cube with Bacardi 151 rum and carefully set on fire.