Kusoldharm Rescue volunteers were called at 5:30pm to an apartment opposite the Bangkok Bank branch on Thepkrassatri Rd in Phuket Town, where they found Daranee Wongsasabai, sitting on the bed, weeping with pain.
Her boyfriend told the volunteers that he and Ms Daranee had gone out to eat. When they returned, she ran in and jumped gleefully onto the bed.
When she did so, she managed to break a spring in the mattress, which pierced her gluteus maximus, and lodged there inextricably.
The Kusondhram volunteers spent 20 minutes cutting the steel spring out of her backside and giving first aid before sending her to Vachira Phuket Hospital.