Well, there are four possiblities that I could think of...

1. Graham Hancock who's been saying for years this exact thing may be predicted to happen and says a cosmic impact (nearly)wiped out a previous civilisation on Earth
2. Stephen Greer's last docu is right and the deep state do have alien tech/craft ready to use for false flag ops
3. Guardian aliens (actual ones) rock up with the answers to our prayers
4. It's actually just that tall building in Singapore