Brief news items of note for Lifehacker readers, including: Cosplayers launch police squad to combat anti-social behavior at cons, get $25 of free travel credit with Uber, the best "dancing liquid" video you will see today.
- The Cosplay Sentinels are a team of specialists trained to assess and deploy anti-harassment tactics at cosplay conventions throughout Australia. The team is fronted by Thorin Black; an ex-military man with experience as a bouncer who currently serves as a police officer in Adelaide. Kotaku has the story.
- Liquid ballet is awesome.
- Car hire service Uber is offering $25 of travel credit to new customers. To get the deal, head to Uber's website and use the discount code "LIVINGSOCIAL15". [Via OzBargain]
- This clip is a masterpiece of visual trickery that appears to break the laws of physics. Made by artist Daniel Crooks, it’s called An Embroidery of Voids and is well worth a watch.