Some Windsor and Essex County marathoners left Boston Tuesday, but they say they can't stop thinking about the horrific scene they've left behind.

Multiple explosions rocked the Boston Marathon on Tuesday, killing three and injuring over 100 more.

It was a bittersweet arrival for many runners and spectators at Detroit Metro Airport.

"I was so happy to be done and excited and now it's just really hard to be excited, it's still hard to be excited," says Marcy Ford from Huntington Woods, Mich.

Woodslee's Cathy LeBoeuf had just crossed the finish line when she heard the boom.

“It was a very large, very loud bang, it got everyone's attention immediately,” says LeBoeuf. “And for that, instantly, everything changed in a second."

LeBoeuf was in the recovery area, just a few blocks away from the explosions that injured dozens and claimed the lives of three spectators.

She says panic took over as people scrambled to safety.

“I saw some people crying, I saw some people being pushed in wheelchairs," says LeBoeuf.

Stephanie Hunt from Ann Arbor was watching the race and came to the finish line just minutes before the first detonation.

"Five minutes after that is when the blast occurred,” says Hunt. “We just left in a nick of time."

Ford ended her race on a high just two minutes before the blast. Things quickly changed.

“I turned around a saw a lot of smoke down by the finish line,” she says.

LeBoeuf says her heart is heavy for victims and is just glad she's back home safely.

"In a runner's world, Boston is the marathon to do. For this to happen, you heart goes out to them," she says.

But what does this mean for the future of the historic event? Ford says the running world will come together.

"I guess in true runner fashion, we keep going," says Ford.