Where and when?
Anywhere, anytime. The current tag is a piece of military equipment. Go out and get a shot fo you bike near a piece of mil equip and then a shot of your bike with the next theme. Could be anything provided it is not something most would not have access to. It should be something that could eb found in most places. Say you posted a shot of your bike in front of a London Cab. the theme would have to be cabs in general.
