Ten years on, after the darkest day for the world's most prestigious marathon, the sound of a heavy bang! or even firecrackers transport one runner to a "weird place" that didn't exist before.
Another acknowledges anxiety about finish lines.
"What ifs?" haunt a third.
But almost to a person, they and other Minnesota marathoners who were at the 2013 Boston Marathon are unified in a special kinship and by their affinity for a race and a city — and its people — that responded to shattering bombs with grace and fierce strength.
Monday, race day, will reflect that anew, and the North Star State will be represented.
At least a dozen Minnesota marathoners who were at the 117th running of "The Boston" are returning for the 127th. They are among more than 360 Minnesotans entered for the start in Hopkinton, Mass.
They aren't the only ones changed by the experience. The U.S. running community, already tight-knit, felt duty-bound after the 2013 attack, said Virginia Brophy Achman, the former longtime executive director of Twin Cities in Motion (TCM), which puts on the Twin Cities Marathon and a variety of other races.
Brophy Achman recalled sports organizations across the country that met in 2014 at the Houston Marathon to hear from the National Center for Spectator Sports Safety and Security (NCS4), formed after 9/11 to educate people about policing and security at major public events. The group would add "marathons and endurance sports" after Boston's bombings, which killed three people and injured more than 260 others. She still sits on a related advisory panel.