I think if I reckon I went about
27 hours without sleep. Not bragging because it's shitty when you get double vision and migraines and sluggish reflexes and tiredness followed up by sleep deprivation
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Umm, I had an all-nighter for an Anzac Vigil once, woke up pretty early in the morning the previous day... Give me a second. 26 hours, give or take.