Since it's the 99th anniversary of the Battle of Jutland, I thought I'd ask a question that has baffled me for a while.
After getting his "T crossed" by Jellicoe after the Run to the North, Hipper executes the famous Gefechtskehrtwendung ("Battle Turn to Starboard") that likely saves the High Seas Fleet from destruction at 1830. But at 1900, Hipper turns back towards the Grand Fleet, who then proceeds to cross Hipper's 'T' a second time. Hipper "battle turns" again, and disengages from Jellicoe.
So my quesiton is this: What was Hipper thinking in turning back towards the battleline of the Grand Fleet?
At 1900, it was not yet dark enough to properly escape. The British fleet was still fully deployed in battle order and would have continued to harass the Germans. Performing another series of agile manoeuvres was a gamble to keep the British off-balance. It worked but not without great sacrifice on the behalf of the German battlecruisers. Jellicoe had to break off contact shortly thereafter fearing a torpedo attack, a decision that he was strongly criticised for in later years.
I think your chronology is a bit mixed up -- the Gefechtskehrtwendung was the second turn away, near darkness, screened by a mass torpedo attack by the German destroyers. The earlier turn was also "a" gefechtskehrtwendung (a "battle about turn") but not "the" Gefechtskehrtwendung people use to describe the chronology of the battle.
Also, Scheer (not Hipper) was in charge of the High Seas Fleet. Hipper's flagship, Lützow, was badly enough damaged that he transferred his flag to a torpedo boat.
Regardless, Scheer turned back toward the Grand Fleet at around 18:55 to attempt to break out to the east, towards the Jade. He realized his ships would be attrited in a stern chase and wanted to throw the British off balance.