I need to stop ending my laughter suddenly

[scrunchables]

Even when someone tells me something funny I tend to laugh a good bit then instantly go stone-cold

This Chris Paul clip is for reference, but I don't fake laugh

 

[gooner23]

do the look down head bob smile and shii

 

[scrunchables]

do the look down head bob smile and shii

I think I developed this habit because I'd always be laughing about some shit with friends in class, but the teacher would obviously ask what's going on so I'd have to immediately stop. I also did it when someone said something straight up unfunny.