The colorful contraption, too large to sink in the shallow waters, piqued the interest of onlookers, thus fulfilling its intent.
More "random acts of curiosity" will unfold through the summer, Johnston added, to raise the final $3.4 million in funds need to build the $27.7 million Museum of Natural Curiosity, set to open at Thanksgiving Point in Lehi by spring 2014.
Smith, creator of the notable submarine, began making kinetic sculpture art that moves through the power of water, wind, electricity or some other means about 13 years ago.
"I weld junk together and make it work," Smith said.
His yellow submarine is made of multiple spare parts, with the main shell coming from an abandoned military water tank. Smith also attached running boards from an old truck, gadgets to resemble control panels and an old trampoline frame.
The yellow submarine initially served as a float in a Lehi parade a few years back before getting repurposed as an April Fool's joke.
After spending a few hours in the Liberty Park pond Monday, the 400- to 600-pound art object was rescued and hauled away "to an undisclosed location," Johnston said.
As for Smith, 34, his hobby is quickly mushrooming into a niche career. These days, he busies himself fabricating large mechanical objects that will be part of the stage decor for conservative icon Glenn Beck's live "Man in the Moon" event to be held July 6 at the USANA Amphitheatre in West Valley City.
"I'm kind of a kid at heart," Smith said of his curious work. "I've always enjoyed playing."
Yellow submarine launches fundraiser
The planned facility needs $3.4 million more in funding to reach its $27.7 million goal.
O To learn more or donate, go to RUcurious2.org or MuseumofNaturalCuriosity.org.