So, according to superstition type things,
lady bugs are supposed to be lucky.
But what if you're driving a rental car on a major highway and suddenly a lady bug lands on the steering wheel, catching you offguard and causing you to swerve a bit.
And you think to yourself, "I'm so lucky!", as you continue swerving on the highway.
After one swerve too many you realize the lady bug is distracting, and you need to lose it.
So you toss it out the window, and to it's death.
Does that cancel out the luck?