Basically, every time you see any piece of John Deere equipment, you need to yell very quickly 'JOHN DEERE!'. Extra points are awarded for larger items, such as a combine harvester, and points are deducted if you incorrectly identify a John Deere (especially the dreaded New Holland), or spot the same John Deere twice in one day. It's easy, as John Deeres are always the same green and yellow colour scheme.

To start you off, here's one for free...

Now who said I wasn't a nerd...