Oops! Emailed the boss of my boss's boss

Oops! After your project lead bailed to golf with rival clients again, you complain to a friend about them among other things. Except you accidently emailed not your project lead, not your manager, but the company's COO - Chief Operating Officer. You head to lunch hoping they are far too busy to see your email...except when you return your floor is hushed whispers and someone is sitting on your desk with a stern look. What did you say in your email?