Gravity

Allegedly this Apple tree was grown from a seed that came from the same tree that dropped an apple on Newton's head... So they say anyway.
Never mind Cambridge trivia like that, I'm more concerned that the gardener is wearing a biohazard suit to feed the grass. 

A couple of extras, a tourist trying to get an uninterrupted view of the Senate house and shot of the Bridge of Sighs from the unusual side.