The explosion would be just the right size to maximize the amount of paperwork your lab would face. If the explosion were smaller, you could potentially cover it up. If it were larger, there would be no one left in the city to submit paperwork to.
Randall Munroe (2014). “What If?: Serious Scientific Answers to Absurd Hypothetical Questions”, p.40, Houghton Mifflin Harcourt
