The Guy's A Jarl!
The Jarl will have been planning (and saving up for) the longest day of his life for 12 years or more, before he dons his raven-winged helmet, grabs axe and shield, and embarks on a 24-hour sleepless marathon.
On the evening of Up Helly Aa Day, over 800 heavily-disguised men (no women, thank you, we're vikings!) form ranks in the darkened streets. They shoulder stout fencing posts, topped with paraffin-soaked sacking.
On the stroke of 7.30pm, a signal rocket bursts over the Town Hall. The torches are lit, the band strikes up and the amazing, blazing procession begins, snaking half a mile astern of the Guizer Jarl, standing proudly at the helm of his doomed replica longship, or 'galley'.
It takes half an hour for the Jarl's squad of burly Vikings to drag him to the burning site, through a crowd of four or five thousand spectators.