Why it is not a good idea to go to sleep early on your birthday

I really wanted to. To get a good sleep of eight hours that i need to be fresh in the morning.

Then at 11 pm i saw three completely dark helicopters flying over my house in military formation. After that i heard explosions, breaking glass, people shouting and the sound of chainsaws just couple of hundred meters away from my home. It went on for at least an hour.

I really would have liked to know in advance, that it is an anti-terrorist exercise.