The former Big Brother contestant was based in Liverpool for the special episode where she was tasked with delivering the weather using a floating map of the UK.
Paying homage to the way the weather was presented during the show’s early years in the Albert Dock, Alison walked up and down the British Isles informing everyone of whether they were going to see rain or sunshine.
However, when it came to reporting on the weather in Northern Ireland, Alison encountered a problem.
As she took the leap across the water, she accidentally pushed helper Chris into the water.
Shocked by what happened, Alison was heard gasping whilst Phillip and Holly also recoiled in horror before breaking out into fits of giggles.
When the camera returned to the studio, Holly asked what happened.
“She pushed him in!,” Phillip exclaimed.
Fans were quick to react to Alison’s antics, with one posting: “Alison caused chaos on the weather map #Liverpool #ThisMorning.”
Another commented: “Jumping from England to Ireland mid-weather report and knocking one of the topless sailors into the water we don‚Äôt deserve Alison Hammond, QUEEN of daytime TV #ThisMorning.”
“Alison Hammond is TV GOLD #ThisMorning,” a third user shared on the social networking site.
This Morning continues on ITV, weekdays from 10.30am.