<human>: This, like most, did not happen today.  We were driving home from a family vacation.  The vehicle of choice was our new and pristine conversion van (two front seats, two middle bucket seats, and back bench seats, the kind housing a little TV that one could connect an N64 up to).  My sister and cousin were in the middle seats, and my little brother and I resided in the very back.  We had been traversing this long stretch of road for quite some time, and my brother's soda was a distant memory.  

Being 3 years old, his bladder was not yet up to par with the rest of us.  He had to pee.  Bad.  It was obvious a lack of attention to this matter would result in an expulsion of urine all over our new conversion van.  That was not an option.  What was the proposed solution?  Might as well recycle and pee into his long empty soda bottle.  Being 3 years old, this was an extremely feasible task if the bottle was held for him.  

Enter older brother (OP).  It fit like a lego piece, and he began relieving himself into the bottle.  There was only one problem.  My sister and cousin were laughing.  Not a little bashful "teehee", but a roaring belly laughter fit for a baby on youtube.  The infectious ailment spread to my brother quickly, and with which he became absolutely inebriated.  The bottle held but only for a moment.  Then, in a manner that would make R. Kelly proud, my little brother began to urinate on me, laughing all the harder.  I attempted to block the stream, but I had no more luck staying dry than one in front of Michael J. Fox with a fire hose.  This only led to the van erupting in more laughter and me being further covered in urine.

Can you provide a brief rundown of the text in within 3 sentences?
<bot>: Little bro had to pee on road trip, tried into bottle, much lol, came unlatched, much pee on me