On مزید than just one occation. The most painfullest being the time I fell , hit my arm on the ground and started sliding back over all the stairs I climbed. Painfull indeed as there was over the twenty steps , and NONE of the steps was made out of SPONGE! Who does that?
i've thought there was one less, does that count?? haha, it was at my دوستوں house in the middle of the night, i stepped over the last step, landed with a very loud thud on my knees on their wooden floor and then whispered "ow" because i didn't want to wake anyone haha! it actually hurt!