When did the audience applaud when you watched it?

The very beginning of the film

When Stan Lee appeared

When Cap wielded Mjolnir

When Dr. Strange's portals began to appear

When the end credits began to roll

Maybe some other moments, but those are the ones that come to mind.

Thor's beer gut.

When it was clear Captain America was wielding Mjolnir, that got a big "YES!" from the audience and at the end.

- When Fat Thor appeared
- When Black Panther, Spiderman and Groot appeared
- When Tony got the stones back from Thanos
- When Thanos died

SPOILERS:
1) When Black Panther first appeared, a woman in the back of the theater yelled “THERE HE IS” and the audience applauded.

2) The audience applauded again at Spider-man's first appearance.

3) When Captain Marvel arrived and destroyed Thanos' space ship.

4) When the camera panned from Thanos to Iron Man, who now had all the stones on his own glove.

5) When the closing credits began rolling.

They never. I watched it wid an unaffected audience, zombies actually.

What had me dying was the lack of applause for Quill. As others have also pointed out, a thunderous applause for Black Panther's return, AND for Spider-Man, Star Lord comes back in the ten seconds between them and the theater got really quiet...

People actually applaud in theaters? Never once been a part of that.