The 64-year-old funnyman was using his weekend to do household chores when things took a turn for the worse.
Adrian was at home cleaning the windows when he managed to get trapped outside on the ledge.
Local firefighters came to rescue actor Bottom – as a crowd gathered to watch the scene and the rescue mission unfold.
Speaking to social media on Sunday, Ade shared his story with his followers, writing, “I just got trapped on a windowsill while cleaning the windows.
“I had to ask the passer-by to get help. The firefighters have come. A small crowd gathered – good fun.
He keeps on: “[Fire Brigade] very nice and didn’t chuckle too much while they saved me.
He added: “How is your holiday going? “
Smuggler Duncan Cumming, 46, was exposed as the Good Samaritan who called the fire department to save Ade when he saw him trapped outside.
He said: “I saw someone on the roof and thought it looked risky – but when I got closer I knew who it was.
“He yelled at me that he was locked out and asked if I would call the fire department, which I did of course. “
“I left once I knew he was okay, but that’s not what you see every day.”
“Every once in a while in London you see famous people outside – but usually not on a window sill! “
Adrian’s report of the incident was met with great amusement from the followers.
A relieved fan tweeted: “Glad you’re okay @AdrianEdmondson but otherwise hilarious!”
Another suggested: “Next time @AdrianEdmondson, please buy some glass cleaner. “
While others noticed the incident was like life imitating art, sharing music videos from The Young Ones where Ade, playing Vyvyan “Vyv” Basterd, smashed a window to enter an apartment.
And another fan recalled an episode of Bottom – in which Ade starred alongside the late Rik Mayall.
They tweeted, “It reminds me of the Bottom episode where you were trapped on the roof of the store with Rik. “