An Irish American mother’s Facebook post of her three-year-old practicing a lockdown drill in case of a potential attacker has gone viral. 

When Stacey Feeley saw her daughter standing on the toilet, she thought the three-year old was just being funny.

“I thought she was doing something cute,” Feeley told CNN.

When she realized what her daughter was doing — practicing a lockdown drill she was taught at preschool — Feeley broke down.

She posted an image of her daughter practicing the drill three days after the most deadly mass shooting in U.S. history killed 49 people in Orlando.

I took this picture because initially I thought it was funny. I was going to send it to my husband to show what our...

Posted by Stacey Wehrman Feeley on Wednesday, June 15, 2016

"Politicians - take a look. This is your child, your children, your grandchildren, your great grand children and future generations to come," Feeley wrote. "They will live their lives and grow up in this world based on your decision."

The post received reactions from thousands of Facebook users,

"This hurts so badly," wrote Madalyn Hooper Squires.

"I'm sorry your little girl is living in a world where shes being taught to hide for her safety," wrote Cat Price. "This truly breaks my heart."

Feeley’s Facebook post came just days before the U.S. Senate voted down four measures that would have enacted tighter restrictions on firearms in the country.