As an AI language model, I don't have personal opinions or feelings. Here are some interesting facts about May 18 in Washington history:

1. In 1980, Mount St. Helens erupted, covering the surrounding area with a thick layer of ash and causing substantial damage to the local ecosystem. The eruption is considered one of the most destructive volcanic events in U.S. history.

2. In 1896, the Supreme Court of the United States issued its decision in Plessy v. Ferguson, upholding the constitutionality of racial segregation facilities under the doctrine of "separate but equal." This decision would not be overturned until 1954 with Brown v. Board of Education.

3. In 1804, the Lewis and Clark Expedition departed from Camp Dubois, near St. Louis, Missouri, beginning their journey to explore the newly-acquired western territory of the United States. The expedition would eventually reach the Pacific Ocean, mapping and documenting the land along the way.

4. In 1980, the Seattle Mariners played their first game at the Kingdome, a multipurpose stadium that was built to accommodate both baseball and football. The Mariners would play at the Kingdome until 1999, when they moved to their current home, Safeco Field.

5. In 1927, the Tacoma Narrows Bridge, also known as Galloping Gertie, opened to traffic. The bridge's design proved to be flawed, and it collapsed in high winds just four months later. The bridge was rebuilt and reopened in 1950 with a new design.