On this week's ERR...

• The killer trailer.
• The Penguin Rule.
• Chasing specificity (and stop with feedback sandwiches).
• Scott the racist.
• Cash as the next innovation.
• Subways and machetes - when is offense actually defense?
• Selfie fences... only the "right" type of tourists please.
• Digital cretin factories.
• Swinging too far... let authors be authors.
• Turns out Ace is a decent (rant) date.