Deadpool's had some absolutely absurd and hilarious adventures over time. However, one of his more ridiculous plots was when he stole Tony Stark's Iron Man armor and decided to try out being the hero to largely catastrophic results.
Since Deadpool first debuted in New Mutants #87, he's become one of the zaniest characters in comics. Over the years, Deadpool would evolve from a Deathstroke-ripoff into a fourth-wall-breaking, foul-mouthed antihero that's become extremely popular and beloved today, largely thanks to the Ryan Reynolds-starring solo films. One of Deadpool's most insane comic plots involved him jumping face-first into one of Marvel's most tragic stories.
In 2013's Deadpool #7 by Brian Posehn, Gerry Duggan, Scott Koblish, Val Staples and Joe Sabino, Deadpool finds himself in the classic Iron Man storyline Demon in a Bottle, where he's hired by a mysterious man (a demon named Vetis) to push Tony back into alcoholism while he's trying to sober up. Deadpool finds Stark dehydrated and half-naked, wearing just small pieces of his Iron Man armor. Instead of getting Tony to drink, Deadpool helps him pour out all of his alcohol. Tony gets a renewed sense of focus with the alcohol gone, but as he attempts to suit up to stop a nuclear powerplant from overheating, Deadpool knocks him unconscious with a beer bottle. Deadpool takes Iron Man's armor and heads to the powerplant to do some hero-ing himself.
With a drink in hand, Deadpool flies off proclaiming "here comes the armored Avenger's most intoxicating adventures!" He wasn't exactly wrong. Deadpool arrives just in time as the reactor fails to cool. Deadpool grabs nuclear fuel rods and attempts to cool them down by throwing them in the ocean, saying "pfft. Being Iron Man is easy, I'll just put these rods where they can do no harm." However, that's not true at all, as Tony arrives on the scene and tells Deadpool they'll be cleaning up the nuclear waste in the ocean for "years to come."
In the end, Deadpool was arguably the worst Iron Man ever. He managed to cool down the nuclear reactor but ended up doing more damage than good. The story proved that not everyone can be Iron Man - even if multiple heroes have worn the suit before. Wade Wilson will always be Wade Wilson, as this mini-adventure proved that even in an Iron Man suit, you can't take the crazy out of Deadpool.