1. William Bullock
Bullock invented the web rotary press, a printing press fed by a continuous roll of paper. In 1867, he either kicked or had his foot caught in one of the mechanisms, which resulted in an infected cut, gangrene, and eventually death.
4. Horace Lawson Hunley
In 1863, Hunley engineered the first combat submarine for the Confederates during the Civil War. Despite the submarine having already sunk once, killing a majority of its crew, Hunley was aboard the CSS Hunley for its the second attempt at the Union blockade in Charleston, where he drowned along with the entirety of its crew.
5. Alexander Bogdanov
The physician invented blood transfusions in order to see if there were any rejuvenation effects on the human body. Bogdanov died in 1928 after his 12th transfusion, which was either infected or of the wrong blood type.
7. Karel Soucek
The professional stuntman developed a shock-absorbent barrel in which he would go over the Nigara Falls. He did so successfully, but when performing a similar stunt in the Astrodome, the barrel was released too early — and Soucek plummeted 180 feet, hitting the rim of the water tank designed to cushion the blow.