Ah, riding Metro during a summer heat wave. Is there a more miserable experience? But as the Washington Post’s Dana Hedgepeth reports, being squished between two sweaty tourists on a hot car is hardly the worst thing that can happen to the Washingtonian commuter: that’s right, it’s time again to remind people about the danger of wearing flip-flops on the escalator. Prepare to meet your doom, toes!

That wearing flip-flops to a rock concert could be dangerous might seem obvious to many of us, but we all know those people who, when the weather finally gets warm enough, more or less refuse to wear actual shoes until the fall. These folks will wear flip-flops to a fancy restaurant, on a first date, or even to church. But venerable rock venue the Black Cat has a message for those of you committed…