One of the best non-profit parties in Pittsburgh returns for it’s summer bash.

“M” is for Mattress saw over 1,200 attendees strap together costumes that started with the letter “M”. From Micky and Minnie, Mad Scientists, Marty McFly, Michael Jackson, and Monopoly, the party was flooded with creative ways to raid the thrift store. We chose M for Mole. After last year’s epic party, Jekko moved to Pittsburgh’s Northside and infiltrated the arts scene. Shh… These photos are top secret.

Foo is the founder of Jekko. Unlike other publishers, Foo attends thousands of events, interviews personalities from startups to Fortune 500s, and blows stuff up on YouTube.