• Alexa understands the command “Turn it up to 11”
• “Up to 11” is an official phrase in the Oxford Dictionary
• The BBC’s desktop iPlayer was designed to go up to 11
• A modified Porsche included a tachometer that, you guessed, went up to 11
• And on the Internet Movie Database, This Is Spinal Tap is the only movie that’s rated on a scale of 1 to 11 stars, rather than 10.