Crazy Ivan

The act by a jogger of suddenly turning around without looking to see if the path is clear

This maneuver is considered unsafe by cyclists.

Legal Cases
In 2015, a jogger who collided with a cyclist in Roanoke in 2012 was ordered to pay a fine of $300,000 for performing a similar maneuver.

Reference
This is a Cold War Naval term. Submarines have a blind spot directly astern referred to as their "baffles". U.S. subs would often trail their Soviet counterparts without being detected by following directly behind them. As a counter to this, Soviet subs would occasionally make abrupt maneuvers to "clear baffles", or change course so that their sensors could detect any pursuers who had been in their baffles. U.S. crews referred to this as a Crazy Ivan maneuver.

The movie adaptation of Tom Clancy's The Hunt for Red October includes a Soviet submarine performing this maneuver in which it turns completely around

Forum Introduction

 * Bells http://bikearlingtonforum.com/showthread.php?p=31678#post31678

Links

 * The Roanoke Times - "Cyclist who collided with runner on Roanoke greenway wins $300,000 civil verdict" http://www.roanoke.com/news/local/roanoke/cyclist-who-collided-with-runner-on-roanoke-greenway-wins-civil/article_06cee958-8513-58d7-9cce-e30ebef81155.html
 * The Hunt for Red October by Tom Clancy https://en.wikipedia.org/wiki/The_Hunt_for_Red_October