If you ask 21-year-old Phil Healy about her unbelievable relay finish that went viral, she'll tell you she wasn't even supposed to be in the 4x400-meter race to begin with. If you ask her how she managed to earn first place after grabbing the baton in fifth position, she'll say it was "pure adrenaline."

Incredible relay comeback WATCH: The most incredible race comeback you will ever see! Keep an eye on how far behind the girl in the red is when the leaders take off and then see where she finished... Just unreal! Posted by Good Morning America on Monday, April 25, 2016

"I did not want to give in. Got the win," Healy said, "and face planted across the line. Just a few cuts, but nothing that was going to knock me down. I was back up again straight away."

The third-year University College Cork nursing student is no stranger to the track. In 2013, she represented Ireland at the European junior championships in Italy. The following year, she broke the Irish U-23 record for the 60-meter dash, finishing in 7.36 seconds. And in 2015, she competed at the World relays to finish fifth -- a new national record.

And now in 2016, the sprinter has gone viral. Her incredible finish has ranked in more than 5 million views in less than a week, and Healy finds herself overjoyed with the feedback she's received.

"Blown away by coverage. ... So many messages from all over world saying that I was such an inspiration and a motivation for them to never give up, across all ages," she said.