That was about 16 hours ago.

@LizNassty (Elizabeth Nass) and @r0se_petals (Rose Mayr) were hanging out on a railroad bridge early this morning.

A few minutes later, Rose tweeted this picture of her and Elizabeth — or more accurately, their feet — dangling over a road below:

You may have already heard what happened:

ELLICOTT CITY, Md. – A CSX train hauling coal derailed from a bridge in this historic town outside Baltimore early Tuesday, killing two teens who were on the tracks and crushing several vehicles parked below a rail bridge, police said.

Killed were Ellicott City residents Elizabeth Conway Nass and Rose Louese Mayr, both 19, Howard County police spokeswoman Sherry Llewellyn said.

She said the train's two operators were not harmed.

Senseless.

It wasn't clear, by the way, if their presence on the bridge had anything to do with the train derailment.