...PSA to all you riders out there who have trouble looking back while riding, try putting your chin to your shoulder...
There are also other "tricks" to keeping a straight line while looking back, anyone else have any others they would like to share?
+1
Another good tip is to take your hand off the bar, put it behind you, and grab the back of your saddle. Once you can do that while still riding in a straight line it's very easy to turn your head without swerving.