Which is the most funny Grunts moments in Halo?

Ever since the Grunts appeared in the Halo video games, which is the most funniest moments from the Grunts in the games?

Any time I shoot the methane tanks off their backs in Reach and the little -Yoinks!- go flying into the air. Never gets old…

To me it is when they try to launch a plasma grenade, but then bounces back at them because of objects/geometry/location and stick themselves. I have seen this happening in CE. It isn’t that common though.

When the master chief says “boo” and then the grunt scaries away in Halo 2.

I absolutely love when dimkee hotay in H5 breaks the reality barrier and makes fun of his own game

I can’t say which is the most funny, it’s those random moments when they do/say something unexpected that makes them funny.