Preheat 2 glass mugs with boiling water and discard water.
Clear all flammable materials from mixing area. Lay down a damp towel or 2 to soak up potential spills. Keep a fire extinguisher on hand.
Pour sugar, scotch and boiling water into one of the mugs, and ignite with a match.
Very carefully, pour flaming liquid back and forth from mug to mug (about 5 times).
Pour drink evenly into mugs and extinguish flame.
Garnish with lemon peels.