I went about 4 days on coke cola and choclates, noodels and coffe with loads of sugar. Your tummy gets fukd... You must sleep for body functions... or you will feel sh*t and rly rly p*ssed off and sick on the 4th day. I went 5days playing wow once but ja not a good idea! I was use to 2-3days but I avoided the light and coffe with lots of sugar helped. Energade works wonders. Depends what you do, sit watch serries and farm xp in wow or use your brain lol? I could never even last 2days if I had to use my body