The mother of a boy on Wednesday thanked two motorcyclists for helping save the life of her son.

"Thank you, my two heroes, for helping the boy," the mother posted a message on her Ployly M Kaewya Facebook account. She also posted a video clip showing her son, Pla Wan.

"Thank you everybody for showing support for Pla Wan," she added.

The mother posted a video clip showing a Grab Food biker helping rescue her two-year-old boy.

He and his parents were stuck in traffic on a flyover when Pla Wan suddenly suffered a spasm. The parents desperately needed to take him to a hospital but the traffic made that impossible.

That was when a Grab food delivery motorcyclist drove past.

"Please help us. The boy is seriouslly ill," the mother said as the Grab rider stopped. She and her sick boy got onto the back of the motorcycle -- damaging the pizza in the box -- and sped to the hospital. 

The hospital was on the other side of the road and the nearest U-turn was some distance away, so the Grab rider asked for help from a taxi motorcyclist. He carried the boy across the pedestrian bridge to the hospital with his mother. 

The Grab biker then continued on his way to deliver the pizza -- and explained to the ride-hailing app why it was damaged.

The mother said she decided to post the video as a lesson for others that thinking clearly and staying calm was vital in an emergency.

Pla Wan thanks his rescuers. (Photo from Ployly M Kaewya Facebook)