Today's afternoon giggle - Test your sleep deprivation

Such fun. We all think we are sleep deprived and know it can impact our reaction time, but have you ever wanted to test just how much? Here's your opportunity:

The Sheep Dash! http://www.bbc.co.uk/science/humanbody/sleep/sheep/

Be sure to try some of their other tests here: http://www.bbc.co.uk/science/humanbody/sleep/