"It's better than a wedding," one guest said.
The hosts for the evening were best friends Malcolm McDowell and Dan Johnson, both 50 years old. They thought of this back when they were freshmen in college. They were sitting in a restaurant - just 18 at the time - but already dreading 50.
"Yeah, 50 is old. When you're 18 and you look at a 50-year-old - they're old," Johnson said.
McDowell added: "Fifty years old seemed responsible and serious and boring."
God forbid they ever become that - so the guys decided right then and there to make a pact.
They promised that when they turned 50, as a hedge against maturity, to do something utterly ridiculous.
Of course, over the next three decades, in many ways, they became just who they were afraid they would. They got married, had kids, and own homes.
McDowell is now the editor of a trade magazine, and Johnson is a customer service manager. But they stayed friends and never forgot their pledge - that no matter how serious life got, when they hit 50, they'd have … a pie fight.
That was the pact. To have a pie fight.
Originally, it was supposed to be just the two of them. But over the years, the more friends and family heard about it - the more friends and family wanted to be a part of it.
Needless to say, the event was neither responsible, serious, nor the least bit boring. In fact, Johnson and McDowell say it was so much less mature than they ever could have imagined. And the timing was perfect.
"The economy is terrible, there's a war - people need to do things totally unlike what they usually are like," one guest said.
"Every time I ask somebody a question!" Hartman exclaimed as he got hit by a pie.
"God, I feel like I'm 16 again!" one guest said.
So much for the elusive fountain of youth - turns out finding it is as easy as pie.