Admiral Conan Antonio Motti was the senior Imperial commander in charge of operations aboard the original
Death Star. The arrogant officer believed in the ultimate superiority of the battle station over any possible foe that would dare challenge it.
Motti was a true adherent to the philosophy of technological might. He found the methods of Darth Vader archaic and laughable. When Vader failed to produce the location of the main Rebel headquarters, Motti openly scoffed at Vader's devotion to the Force. The Dark Lord of the Sith quickly educated Motti as to the Force's true power by inflicting a telekinetic stranglehold on the admiral. At the behest of Grand Moff Tarkin, Vader released Motti, and it was a lesson that the admiral wasn't soon to forget.
It's likely that lesson was still on Motti's mind as he perished a short time later when the Rebel Alliance destroyed the Death Star.