Nic Cage's son, Weston Cage, has been taken to the hospital by ambulance for a mental evaluation and possible 5150 psychiatric hold, sources tell TMZ.



Sources tell TMZ ... Weston was at The Farmer's Kitchen in Hollywood at around 4:00 today, when his trainer told him he couldn't eat something on the menu.  For some reason, we're told Weston went off and started pushing the trainer in a violent way, at one point trying to roundhouse the trainer.

The trainer took Weston down, and someone else tried calming Nic's son down, to no avail.  Weston got up and continued freaking out.

Cops showed up and told Weston if he didn't get on the ground they would tase him.  Weston then complied.  Cops put Weston in handcuffs but they were so worried he was unstable they strapped him to a gurney. 

It's unclear if Weston was under the influence of drugs or alcohol but people who work at the restaurant say he appeared to be under the influence of something.

Weston was taken to a local hospital where he is being evaluated.

One source says Weston got into a nuclear argument with his new wife, Nikki, this morning and she stormed out of their house.

UPDATE:  Sources close to the Cage family tell TMZ Nic has arrived at the hospital.  We're told Nic has cleared his schedule and plans to stay in town as long as Weston needs him to be here.