Don't know what to do with your jack o'lantern after Halloween? Bring it to Hudson River Park's Pier 84 and send it back to nature in this hands-on composting event! The Parks Department will provide your weapon of choice (bat, hammer or shovel), while you provide the pumpkin or gourd. You'll get 15 minutes to smash it, after which it'll be turned into fertilizer. It's a sustainable way to celebrate the end of spooky season.