Onlookers who saw Heather McDonald collapse on stage after she bragged about taking the booster shot thought it was part of her act, but the comedian had to be rushed to hospital.

“I’m vaxxed, double vaxxed, boosted … and flu shot and shingle shot and haven’t gotten COVID and Jesus loves me most,” said McDonald during a show in Tempe, Arizona in what was only her second joke of the night.

The audience thought the joke and dramatic collapse was part of a skit, but it was no laughing matter.

“As soon as she delivered the joke, she just collapsed and hit her head on the floor,” reports TMZ. “Everyone thought at first it was all part of the act, but it was not. She was conscious, but clearly, all was not well. An EMT and a nurse happened to be in the audience … they rushed up on stage to provide first aid.”

“I got up, I did one joke and I felt so dizzy,” McDonald said. “You can see my eye, I fell on my eye. Oh my God, I cannot believe this happened, I feel so terrible that they had to tell everyone to leave and then cancel the second show.”

A spokesperson for the comedian said she “may have lost consciousness because of dehydration” before suffering a skull fracture. She later tested negative for COVID-19.

During a subsequent video clip filmed in the ER, McDonald said, “I’ve never, ever fainted in my life.”

Innumerable sports professionals in peak physical condition, particularly soccer players, have suffered mysterious sudden collapses in recent months, but experts insist that there is no link to vaccines and that the spate of heart problems is merely a “coincidence.”

Last week, we highlighted the tragic story of 21-year-old Greek footballer Alexandros Lampis, who died after collapsing just five minutes into a game.