"A foolish faith in authority is the worst enemy of the truth." Albert Einstein at age 21.

In Jean Pernet's, a professor's class, Physical Experiments for Beginners, Einstein received the lowest possible grade. When given an instruction sheet for the lab, he pitched it in the trash, and did the experiment in his own way, but eventually that caught up to him later when he caused an explosion in Pernet's lab and injured his right hand . . .

Not to give the wrong impression, Einstein generally excelled in all his classes save French and the labs, although Herman Minkowski labeled him a "lazy dog" because he did not bother with mathematics, something that Einstein himself said that he later regretted.

This all from Walter Isaacson's Einstein His Life and Universe.