26 hours: Anything over and above 26 hours without sleep is simply quite dangerous for you. You may begin to lose your co-ordination and find it hard to keep your balance, you develop short-term memory loss and have trouble recalling things you recently did and said, and you may start to hallucinate. When this starts happening, that is the signal to sleep straight away.
30 hours: At 30 hours we begin to lose our sense of smell and touch. This is because the receptors in our hands and noses aren't functioning properly due to the lack of rest we have recieved. Your brain is still trying to do a million things at once, so partially losing sight or your sense of hearing after 30 hours awake is not uncommon.
40 hours: After 40 hours awake our body goes into fight or flight. It releases adrenaline as a way of not giving us a thrill, but to stay awake. Our body can no longer rely on the accumulated 'rest' it's recieved, as it hasn't recieved any for nearly two days straight. Hallucinations become more vivid and microsleeps (involuntary 5-10 mins of deep sleep) may occur.

http://thepeoplechannel.blogspot.fi/2010/04/what-happens-if-you-stay-awake-too-long.html

Just FYI.