While taping for her upcoming series "Magkaribal," the hem of Gretchen's red gown was caught in a wheel of a moving motorbike, pulling down her gown in the process.
The wardrobe malfunction happened while Derek was the one driving the motorbike.
"We are on a motorbike. Gretchen is looking beautiful at the back of the bike with her long gown and we are trying to get this effect na we will fly by the camera with dress," Derek said.
"Nakayakap ako sa inyo. Maya maya nakaganoon na ako (leaning backward). Akala ko may humihila. 'Yon pala yong tire inipit 'yong gown tapos sumigaw ako," Gretchen said.
Derek said Gretchen's gown was pulled down.
"In other words nahubaran ako," La Greta added.
"So ako naman I felt her let go so I hit the brakes. She fell forward then she just said 'don't move.' Alam ko na. When I hit the brakes she fell forward so I was able to cover her," Derek said.
Gretchen added, "Nung nahulog [yung gown] na talagang down, wala akong sticker bra, wala akong niplets. Buti na lang nakatalikod si Derek. Pero sabi niya may mirror siya sa harap pero hindi siya tumingin.
"Kung hindi dahil kay Derek wala na ako ngayon. Buhay ako dahil sa kanya. Thank you ha," Gretchen told Derek.
Gretchen said that she's just thankful that she and Derek were not hurt in the incident. What makes her sad, though, was her expensive red gown, which according to reports, is worth P80,000.
"Hindi ko sasabihin kung magkano. Actually hindi ko pa nababayaran," Gretchen said.