Going to Walmart can be rather interesting, particularly if you're into people watching.

But this incident goes beyond simply amusing.

WDIV reports that Wayne State University medical student Melanie McQueen was in the Walmart in Taylor recently when she saw something that looked like part of a Halloween display:

"I could only see the lady's head and it looked like a Halloween decoration at first because it was very blue."

Turns out it was a 50-year-old woman and things weren't looking good.

"She was pulse-less at the time," McQueen told WDIV's Paula Tutman. 

McQueen jumped into action, using something she had learned in med school just days before, WDIV reported

"We had gone through what's called ACLS training -- advanced cardiac life support training. We only had two days of instruction. The entire time I was thinking, 'This is so different than the manikin," she told the station."So I started doing chest compressions. We did bagging inhalation. We defibrillated her three times. The way you know you're doing it right is when you start breaking ribs. I broke a rib and I remember thinking, 'Oh my gosh. That was a rib.' It was just like an eerie feeling ... all in the middle of Walmart. But, eventually she had a pulse."

The woman lived.

Read more: WDIV