FOUND It! I DO IT AT THE VERY END http://www.youtube.com/watch?v=81gNLL94Suw&NR=1 PS. IT WAS 18 STAIRS
lol coool the most I've done is 8 but I've never really seen anything bigger around here except this like humungous 9 flat 9
most I've done is 9 but biggest I've done a trick down was 7 i can thro fs 180's heelflips and kickflips down sevens and verial heels