The Flash #108 (1959)

In The Flash #108 (1959), we meet the speedster, Barry Allen, and his companion, Iris West, at a Fourth of July picnic. During their leisure time, Barry's mind wanders to his latest heroic adventure as The Flash. The Flash had been tricked into measuring his top speed for science and was bombarded with a strange radiation that forced him to run or face certain death. But, little did he know, he was being held in place by a beam of radiation that beyond his control. With every attempt to slow down, The Flash found that he continued to run at an increasing speed that brought him closer to his demise.

The Flash then realized that he would need to exceed the speed of light if he were to break free of the radiation beam. In his efforts to find a way out, The Flash's scientific curiosity was piqued by a piece of fulgurite that suddenly vanished. After further investigation, he learned that several museums had reported similar thefts of fulgurite, and he found himself in the pursuit of an alien speedster who was stealing them away.

In the end, The Flash discovered that the aliens were taking any object struck by lightning on Earth back to their planet, Mohru, where they drew out the essence of the lightning to give themselves super-speed. As he was the only one who could stop them, they attempted to take him out, but he prevailed. In a separate story, we meet Grodd, a gorilla with a genius mind, who planned to conquer Earth with his army of gorillas. The Flash was the only hope for Earth, but he needed to first uncover "The Super-Gorilla's Secret Identity!"