Heidi Klum Looks on While Models Pose in Underwear on Flatbed Truck

Heidi Klum‘s not telling any of her potential top models to get a room … ’cause she’s cool with them rolling around in a bed outside — for a photo shoot, that is!

The supermodel was rolling around Hollywood Thursday in a flatbed truck along with a full crew … and, they all looked on while a photographer snapped pics of two half-naked models rolling around together on the mattress.

Watch the clip … Heidi chats with the person next to her as the two subjects hit different poses in just their underwear — flexing every muscle they’ve got for the cameras.

It’s a pretty wild scene … and, sources tell us it’s all for the 20th season of “Germany’s Next Topmodel.”

We’re told the production team is recreating challenges from the past … including this one, where a couple of the model contestants are moving but still need to pose for photos.

Heidi posted a video from the set … not clear what she’s saying ’cause it’s in German — but, it looks like she’s excited to be filming!

BTW … Heidi’s created viral moments like this while filming the show multiple times over the years — including back in 2018 when she watched a model shower on a public street.