By Diane Chase Now is your chance to put science to the test, make a catapult and see if your invention can out distance your neighbors. Punkin' Chunkin ' will take place this Saturday as part of the Long Lake and Adirondack Center for the Arts' Oktober Pet Fest. Each participant will receive three pumpkins with a misfire being treated as a foul. Each pumpkin will weigh approximately 8-10 lbs. so plan accordingly. No cannons, ignitables or explosives, if that is where your mind is running. Eye protection and hard hat is provided. “We have been working with the Adirondack Lakes Center for the Arts to make this an event for everyone,” says Long Lake Event Coordinator Denise Gagnier. “It is the third year for the Pet Fest and we wanted to work with our neighbors at The Center to provide an active event for the Columbus weekend.” According to Gagnier, the Long Lake Oktober Pet Fest will host a variety of unique activities geared toward pet owners. There will be