Very good friend of mine was the dispatcher on board at the time. She just came by after medical checks and initial debriefing. She was standing in the forward cabin talking to the Captain about a departure delay as engineering were still doing something (she wasn't sure what), F/O was (seated?) in the flight deck. No warning of collapse and they were thrown to the floor. Fortunately it seems no persons underneath or loose cargo pallets moved. Door is severely damaged and possible engine damage due ground contact.