A stopwatch on the brain’s perception of time

«…But, «quite unexpectedly, sadness does not affect our perception of time, no doubt because the emotion felt when watching a sad film is not strong enough to slow down physiological functions,» Droit-Volet explains. However, she adds, work is needed on the profound sadness associated with periods of severe depression. Her team is currently looking at whether the internal clock may slow down in healthy subjects who practise meditation and relaxation. Is it possible they may step outside time in this state?»

http://www.theguardian.com/science/2013/jan/01/psychology-time-perception-awareness-research