So just how long does it take to throw 150,000 tomatoes around a small Spanish town?
That's the question thousands of people from all over the world aim to find out when they land en masse for the great tomato splat-fest in Punol.
The annual Tomatina tomato fight is a street party with a difference. Originally inspired by a food fight amongst children in 1945 it has swelled into a real moneyspinner for the town.
And are there any rules? Well, don't go tearing each other's clothes off otherwise pretty much anything goes.