Planet Mad

It's Friday afternoon, and while most people are leaving their place of work joyful in the knowledge that they have two whole days off, I am stuck knowing that I have to teach tomorrow. I know that we get holiday days in lieu, but as my next holiday is still 8 weeks away it doesn't make me feel any better right now. Oh dear - I appear to have turned into a whinging cow....I do alopogise! Instead, here is an exciting joke I heard in the pub yesterday:
What's the difference between a buffalo and a bison? A - you can't wash your hands in a buffalo!!