Grumpy Old Geeks Topics Bagel head injections Topic Bagel head injections 2 mentions in 1 episode A forehead modification trend in Japan that the hosts describe as using saline injections. Mentions 18: A Cornucopia of Crazy Making Jul 29, 2013 38:26 There's a thing in Japan now where they're called the Bagel Heads. 39:34 The saline is absorbed into your system.