Something Wierd

Something wierd is going on

In the stairwell by my door

Three times now

When home for lunch

I open the door to go down the stairs

And someone's on the landing above

Doing something noisy

All three times, their foot visible upon

The first stair

They stop when I come in

And don't begin till I've exited the bottom

Of the stairwell

Seems odd

Especially after three times

Something wierd