Actors often ad-lib lines during filming, either in the interest of humor or character, without knowing whether they’ll make it into the movie people see in theaters or end up on the cutting room floor. Sometimes what comes out, though, is too good to cut out.

These 12 moments are so great, you won’t believe they were made up on the spot.

#1. “It’s not a hug. I’m just grabbing for the door. We’re not there yet.”

The whole interaction was improvised, starting with the hug itself and flowing into RDJ’s awesome response.

#2. “Nobody would know.”

He did all of the joking about shooting Quicksilver in the back on his own, and it’s now one of Hawkeye’s most memorable lines.

#3. “I am Iron Man.”

That iconic line? Yep. All RDJ.

#4. “You’re supposed to move now so I can sit on the bed.”

Tom Holland forgot his blocking so RDJ just stayed in character and made it work. Pro!

#5. “Please be a secret door, please be a secret door…”

He also improvised the quiet “yay” afterward.

#6. “Help! Please…my brother, he’s dying! Get help!”

Chris Hemsworth came up with the whole gag in the moment and Tom Hiddleston just went with it.

#7. “Blueberry?”

Apparently RDJ is a notorious random snacker, and he was actually just noshing blueberries when he decided to offer Chris Evans one in character.

#8. “Why is Gamora?”

The last scripted line is RDJ’s “Who is Gamora?” but Dave Bautista, the actor who played Drax, ad-libbed the final “I’ll do you one better: Why is Gamora?” and screenwriter Christopher Markus replied “Ok, you’re very good at your job.”

#9. “Try me, Beyonce.”

In Doctor Strange, Benedict Cumberbatch made the Beyonce joke up in the moment, and then later, Wong can be seen listening to Beyonce “for research.”

#10. “I don’t wanna go.”

The co-director of the film simply told Tom Holland to “act like you don’t want to go.”

#11. “Hey, Auntie.”

Angela Bassett said during an interview that Michael B. Jordan improvised the cheeky line during their first meeting.

#12. “He’s a friend from work.”

It was actually ad-libbed by a Make-A-Wish kid who was on set that day – Chris Hemsworth said, “We had a young kid, a Make-A-Wish kid on set that day. He goes, ‘You know, you should say, ‘He’s a friend from work!”

When it’s good, it’s good! (Also, Robert Downey Jr. does NOT stay on script…)

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