A useful reference for this subject: A possible way to keep cats from falling.
The waitress will always come after you take the first drag of a newly lit cigarette.
So will the bus or train.
If you are a Murphy, special attention will be paid to you with regards to Murphy’s law enforcement… just to prove that that bastard isn’t playing any favorites. 
My wife didn’t believe me, until she married me, and changed her name to Murphy, and drew his keen attention.