Because you have to drop the bomb twice for her to get the message.
There were two Canadians and an American. They put letters in a hat and drew. They got "C-eh", "N-eh", "D-eh". The American didn't know what was going on, but he relayed the message. I know i need to work on my execution.
A bird who knocks before delivering its message !
You have to drop the bomb on her twice before she gets it.