Much like in sword swallowing, this can take a lot of practice. The sneeze reflex is one of your body's defense mechanisms against bacteria and viruses-- when you sneeze, you forcibly expel particles that could make you sick. In other words, a human blockhead ignores one of the tools the body uses to prevent illness.
The Amendment Process. There are essentially two ways spelled out in the Constitution for how to propose an amendment. One has never been used. The first method is for a bill to pass both houses of the legislature, by a two-thirds majority in each. Once the bill has passed both houses, it goes on to the states. This is the route taken by all current amendments.
The 14th Amendment to the U.S. Constitution is passed, guaranteeing due process and equal protection rights to all citizens. 15th Amendment Passes. The 15th Amendment to the U.S. Constitution is passed, guaranteeing the right to vote for all U.S. citizens.