An atomic bomb designed by an undergraduate in physics. There have been some cases of an atomic bomb being designed by an undergraduate in physics.One made that his class thesis.
It is a myth that it takes a superbrain to design an atomic bomb. Designing the first one was hard because the basic principles had to be worked out but now that they are known many people with a background in physics can design one.

When you eat dirt for the first time and leave your family to build a shack in the woods