Confusing Email subjects...

According to frontbridge these are the top 10 confusing email subjects:

The Top 10 Trickiest Spammer Subject Lines:

1. RE: Information you asked for
2. hey
3. Check this out!
4. Is this your email?
5. Please resend the email
6. RE: Your order
7. Past due account
8. Please verify your information
9. Version update
10. RE: 4th of July (Or, I am assuming, a close holiday)

I know I have used "hey" as a subject many times... have to try to get a new throwaway subject.