Terry Williams sat in his car with the windows up when it was almost 90 degrees outside and filmed what happened before posting the clip on YouTube.
"I can barely breathe out here. But my system is stronger than these little kids' systems"
In his video, Mr Williams says: "I'm sitting in the car with the windows rolled up cause I want to know how it feels to be left in the car.
"I would never leave my kids in a car like this, man."
READ: DAD WHO DELIBERATLY LEFT SON TO DIE IN HOT CAR MAY FACE EXECUTION
"As you can see, I'm sweating - like, I can barely breathe out here. But my system is stronger than these little kids' systems."
Mr Williams, from Greensboro, North Carolina, adds: "This is not a game. This is serious. Don't be the next fool on the damn news talking about you left your kids in the back seat."
READ: FATHER OF HOT CAR DEATH TODDLER WAS SEXTING TEENAGER ON DAY SON DIED
Experts have warned that temperatures can soar inside a closed car, quickly rising by as much as 20 degrees.
This makes it extremely unsafe for anyone, especially young children and pets, to be left inside.
READ: POLICE DEFEND MURDER CHARGE DECISION FOR DAD WHO LEFT HIS TODDLER IN HOT CAR FOR SEVEN HOURS
Meanwhile Justin Ross Harris faces execution after being accused of murdering his 22-month-old son by deliberately strapping hum in the back of his car and baking him to death in Atlanta, Georgia.