Drew showed how to brew and serve beer within six days. Obviously, as human beings, when there's a barrier, we want to kick against it real hard to see whether it will break, or at least move.
So, in the interest of fun science, is it possible to brew a beer and pour it within 4 days - say brew in the morning of the first day, serve in the evening of the fourth. My general idea would be to ferment in the keg under pressure with a spunding valve, so carbonation would take no extra time. Obviously a very low gravity beer with big flavors to 'overpower green beer syndrome' as Drew puts it.
So, "pour in four", or in Dutch "bier in vier" (beer in four), can it be done?