But instead of horrified gasps, the crowd erupts in laughter and applause.

"It's a bullet! It wants to put me in the grave," Hong Kong actor Loong Koon-tin sings, in the high-pitched falsetto that is the hallmark of traditional Cantonese opera.

The attempted assassination of Donald Trump, recreated as part of an absurdist play in Hong Kong, has given fresh inspiration to a centuries-old art form, drawing hundreds to witness the spectacle at a beloved theatre on the verge of shutdown.

Older theatre-goers recall a time when operas were mostly about Chinese stories and legends.

The Trump show -- which debuted in 2019 and has been updated twice -- is part of an effort to modernise the genre and connect with younger audiences, for years an uphill battle for the industry.

"Audiences want to see how the assassination scene can be done using Cantonese opera," said playwright and feng shui master Edward Li, citing four techniques -- singing, acting, recitation and acrobatics.

The sold-out show, which runs for nearly four hours, begins with Richard Nixon meeting Mao Zedong in 1972 then spirals into a tale about Trump searching for his lost Chinese twin.

North Korean leader Kim Jong Un also makes an appearance.

"It's Cantonese opera with black humour," Li said.

"We are not making fun of the situation, but the audience finds it funny."

The novelty factor is key to the appeal of "Trump, the Twins President" and there are plans to take it on tour, he added.

"Trump is someone the whole world wants to know."

- Legacy theatre -

Crowds last week flocked to the 52-year-old Sunbeam Theatre, an ornate venue with a huge neon sign and posters overlooking a busy intersection in Hong Kong's North Point neighbourhood.

Its lobby is adorned with calligraphy, a gong and drum for good luck -- as well as 108 signature round lamps suspended from the ceiling.

Cantonese opera originated in southern China and became a staple of post-war Hong Kong's cultural life, with its popularity peaking around the 1960s.

But with changing tastes, Sunbeam ran into financial trouble and nearly closed in 2012 before Li, the playwright, took it over.

"We live in an era when Cantonese opera is at its lowest and closest to death. We need to give it an adrenaline shot to revive it," he said.

But the revival couldn't last.

Following a sale, the theatre will close its doors for good on March 3 and its new owners plan to convert it into an evangelical church.

Hong Kong officials say they have spent HK$200 million ($26 million) in the span of two decades to promote Cantonese opera. A purpose-built theatre was opened in 2019.

But Dennis Cheng, a supporting actor, said he was "not positive" about the future of the art, citing the lack of venues and dwindling audience.

It will be hard to match how Sunbeam -- with its history and communal spaces -- felt like home to performers, he added.

"(Sunbeam) carries the energy of veteran actors, as well as the emotions and dreams of many people," said Man Chan, who plays Ivanka Trump.

- Bowing out -

Since its 2019 premiere, the Trump show has sparked both acclaim and ridicule, becoming the subject of memes.

As it wrapped up a three-day run, questions remain as to whether newcomers who bought tickets out of curiosity can be persuaded to stay for more conventional fare.

High school student Matthew Tsui told AFP that he was introduced to Cantonese opera by his grandmother and fell in love with the elaborate costumes.

But he admitted it was "tough to sit in a theatre for hours to watch patiently" and that his classmates preferred K-pop.

Fanny Cheng, a self-described Cantonese opera superfan, said she enjoyed both traditional and modern takes and hoped that Sunbeam Theatre ought to be preserved.

"It'll be a pity to lose Sunbeam," said Cheng, 60.

"But if the landlord wants to sell the property, there's nothing we can do."