Phillip Schofield fell about laughing on the This Morning sofa on Friday after watching a clip of Alison Hammond falling over.
Mum-of-one Alison suffered a nasty fall in her back garden recently and is still wearing a bandage on her knee.
Despite Phil and his pal Holly Willoughby hosting Friday's show, Alison still showed up for work and helped with the Spin to Win segment as well as the phone in.
As the three of them sat on the sofa, Alison gave fans a glimpse of her injured knee as she spoke about her fall.
Phillip, 59, then began laughing hysterically as she revealed Alison had shown him a video of her accident - and she didn't have any underwear on.
Struggling to get his words out, Phillip said: "As she fell over in the pouring rain, she wasn’t wearing any knickers! That was a hell of a shot when I watched that first thing this morning!"
Alison immediately burst out laughing as she added: "But then I showed you when my brother was strong to pick me up!"
This Morning decided to go to an ad break as Holly was heard saying: "Right, I want to see this video!"
When the show returned, Holly confirmed that she had watched it and then decided to give viewers at home a glimpse of it too.
As the clip aired, a giant pink heart protected Alison's modesty as Phil shouted out: !Oh my God, noony out!"
"But it’s not that big!" Alison replied, referring to the strategically placed emoji.
Phillip then asked: "Why have you got a shower cap on?!" but this just sent Alison off even more as the howled in the studio.
"Its a silk head scarf," she replied, before adding: "I was relaxing at home!"
"Well you would be with no pants on! Going commando in your garden!" Phillip told her as he and Holly continued to laugh at Alison's mishap.
This Morning airs weekdays at 10am on ITV.
