it's now a scientific fact, motorcycles are organ donor machines: "In an analysis of 7 annual motorcycle rallies from 2005 to 2021, the number of daily donors increased 21% during motorcycle rallies compared to the four weeks before and after"

Earlier studies have linked motorcycle rallies to trauma cases at local hospitals and excess motor vehicle fatalities. Among half a million attendees at Daytona Bike Week in 2000, 570 people were involved in 281 motorcycle crashes that led to 72 hospitalizations and 11 deaths, according to a 2003 study in the Annals of Emergency Medicine. 

 Multiple factors may lead to the increase in crashes, the researchers said. Traffic infrastructure in rural areas where rallies are held is is suited for smaller populations and less traffic. Motorcyclists involved in crashes tend to be older, male and likely to engage in risky behaviors, like drinking alcohol before riding, according to an analysis in 2021.

https://www.bloomberg.com/news/articles/2022-11-28/organ-transplant-surge-data-show-dangers-of-large-us-motorcycle-rallies