Instant window smoke from Spawn 8 (right of stairs, second row of spawns)

Crouch, line up, hold W and left-click during freezetime. When the round starts, jumpthrow after the crosshair leaves the central dark orange ornament of the carpet.

See instant window smokes from other spawns:

• Spawn 1 [64-tick] [128-tick]

• Spawn 2 [64-tick] [128-tick]

• Spawn 3 [64-tick + 128-tick]

• Spawn 4 [64-tick] [128-tick]

• Spawn 5 [64-tick] [128-tick]

• Spawn 6 [64-tick] [128-tick]

• Spawn 7 [64-tick] [128-tick]

• Spawn 8 [64-tick] [128-tick]

• Spawn 9 [64-tick] [128-tick]

Additionally here's another fast way to smoke window on both tickrates.