@buzzbox
What you jst said is also rubbish. No offence.
Cabin crew can initiate evacuation if they belive that is necessary and are trained not to open a door with fire/smoke outside. They initially stand by and wait for a command from the Flight Deck, if during that time situation requires a evacuation than they can start without the command.
So, stop assuming nonsense.
SIA has experienced, well-trained cabin crew. Don't make assumptions that they would have opened a door with fire outside.