AUGUSTA — Mike Davis stands Saturday at his one-day-only show during Maine’s Odd & Unusual Show next to a covered glass container, asking each passerby to test their unbelief in mermaids.

When those passersby agree, he demands a quarter to remove the cloth and prove them wrong — it used to cost a dime, he tells one customer, but nobody carries dimes anymore. He also takes little trinkets as payment, he tells another.

And when he has his quarter or trinket, he launches into a 20-second rehearsed monologue and flings off the cover on the glass container, revealing a monkey-eel hybrid creature.

“May I present the fabulous Feejee Mermaid, plucked from the sea off the shores of the Far East, the land of the rising sun, Japan,” his speech goes. “Oh, for many a generation, melodies of this sweet siren drowned many a hapless sailor. Pulled to their graves, unwillingly did they go beneath the waves, down into the depths of Davy Jones where they await their judgment, now fossilized by her stay on the surface.”

Bridgton Historical Society’s Mike Davis unveils the Feejee Mermaid on Saturday during Maine’s Odd & Unusual Show at the Augusta Civic Center. Anna Chadwick/Morning Sentinel

Davis’ mermaid show, put on at the Bridgton Historical Society’s booth, was one of dozens of vendors at the Odd & Unusual Show in the Augusta Civic Center. Sellers lined the walls in booths with animal bones, homemade jewelry, paintings, clothing and jars filled with everything in between.

Several performers also took to the stage during Saturday’s show. The first show, put on by a performer Charley Quinn, involved Quinn laying — and then doing a headstand on — a nail of beds.

Quinn said the nails still “slightly hurt,” but not nearly as much as it looks, as long as she spreads out her weight. She got into the nail bed performing business when her friend gave her half of his full-sized bed.

“He told me, ‘You’re the only other person who’s weird enough to try this,'” Quinn said.

Now, though, she said she sometimes lies on her back on top of the nails with her feet up in the air — and her toddler on top of her feet.

Charley Quinn, a professional flow artist, does a headstand on a bed of nails Saturday during a performance at Maine’s Odd & Unusual Show at the Augusta Civic Center. Anna Chadwick/Morning Sentinel

Along the edge of the convention floor, between a vendor selling skull jewelry and another showing off his personal hearse, Wayne Fitch showed off his gold-painted replica of a car used in the 1964 TV show “The Munsters.” It took him six months to build by hand, and it is normally showcased in the unnamed museum he opened last year in Clinton.

The car’s main cabin was made out of a casket donated from a local funeral home, and the steering wheel from a 1960s lawn mower Fitch bought at a yard sale. Standing behind the golden car is an 8-foot Frankenstein made — again, by hand — by his museum curating partner, Paul Alexander.

Fitch, 82, is a car collector, having bought at least 300 during his life. He said he wants the museum — open Mondays and Tuesdays at 1219 Battle Ridge Road in Clinton — to reflect that passion.

“Hopefully, it’s going to be a museum of everything transportation,” he said.

At next year’s Odd & Unusual Show, Fitch said, he plans to bring a Batmobile replica he is currently building.

It’s actually his second Batmobile — the first one he built got too expensive to keep up, and this new one, Fitch said, is much safer to drive around and bring to big events.

The Odd & Unusual Show continues Sunday from 10 a.m. to 6 p.m. Tickets are available online and at the door.