history: I tripped on the stairs of a subway because one stair was higher than the others and I got quite angry at it. I tripped the other day on a stair becuase one was slightly higher than the others. Oh no_comma_ are you ok?
current: Yea im fine but it was quite an embarrasing and frustrating situation.
next: I can imagine, perhaps it's a good way to get someone to fix the steps?