Ok i kno this is kind of embarassing but when im with a family member or close friend and we start busting up jokes and talking about old funny memories, somtimes i laugh sooo hard that i cant take it no more and i just pee on myself lol this has happend to me almost everytime they make me laugh hard. It litterly just comes staight out no matter who im with or where im at.It gets annoying somtimes and very embarassing.. is it normal?

Fun.
Not really 'normal' as such, but it can happen. Maybe be proactive and go piss before you meet up with these people?
http://men.webmd.com/kegel-exercises-treating-male-urinary-incontinence
http://www.mayoclinic.com/health/kegel-exercises/WO00119
If you're going out and are worried you might have an accident,discreet incontinence pads for both sexes are sold in the supermarket-usually in the sanitary pad section.
If you find it's becoming a problem or you have incontinence at other times,see your doctor.There are various treatments available.
Other than that,don't worry! Try the Kegels and most importantly,don't stop laughing.It's the BEST medicine!