The hardest I ever laughed was ...

For me, it's four celebrites...

first time I heard the Coon Hunting story by Jerry Clower. I was, at most, 8.
Bigger Blacker Chris Rock
Dressed to Kill by Eddie Izzard.
Stomach problems in Bridesmaids

and two from our own family

and this relic. http://www.sportsjournalists.com/forum/threads/82939/ smallpotatoes car problems

and this one too ...http://www.sportsjournalists.com/forum/threads/20676/ turning a romp in the hay

 

"Knock him out, John!!!"

 

I still crack up to M*A*S*H.

I think the one I laugh at the most to though is "Edwina."

When Hawkeye is preparing for the date and all the men in camp are saluting him for "taking one for the team"

The string of comedy during the date scene gets me every time.

From IMDB:

Captain Benjamin Franklin Pierce: Dance with me? Carefully.

[They dance. Edwina backs Hawkeye into the stove]

Captain Benjamin Franklin Pierce: Ow! Ow!

Nurse Edwina 'Eddie' Ferguson: That does it! I'm hopeless!

[Accidentally knocks over a tray of glasses]

Captain Benjamin Franklin Pierce: No, no! Cheap glass, that's all that is. Who cares about that? That doesn't matter, what matters here is you...

[sound of crunching glass]

Captain Benjamin Franklin Pierce: Ow! Ow!

Nurse Edwina 'Eddie' Ferguson: What is it?

Captain Benjamin Franklin Pierce: I'm not wearing any shoes!Ow! Ow!

Nurse Edwina 'Eddie' Ferguson: You poor thing, your feet must be cut to ribbons. You better lie down.

[Upends Hawkeye, who falls on his cot, nearly collapsing the tent]

Nurse Edwina 'Eddie' Ferguson: I killed you.

Captain Benjamin Franklin Pierce: I don't have that kind of luck.

 

Without looking it up, Edwina was Millie from Mayberry, RFD.

 

Vic Ferrari

 

Exceptional my ass.