A ceiling gave way at a busy Chinese restaurant in Kaimuki during the lunch rush, injuring four people — bad news for diners and the building's owners, though it could have been far worse.

• Part of the ceiling at Happy Days Chinese Restaurant in Waialae Plaza came down while about 40 people were eating lunch.
• A woman in her 80s was taken to the hospital with cuts; three others had minor injuries and stayed behind.
• Diners said the ceiling came down gradually rather than all at once, giving people time to move clear and get out.
• Firefighters, paramedics, and police responded, and everyone left the building on their own.

Outlook: Fire officials are still investigating what caused the collapse and checking whether the rest of the building is safe.