I knock on the window in my mind and a knock at his window wakes him up

A friend was a few minutes late the other day and I wondered if he’d overslept.   I thought about calling him, but didn’t want to awaken the whole household.  I decided to call him in my mind and see if he woke up dreaming the phone rang.  I let it ring for awhile.  Then I thought to knock on his window in my mind.  I first knocked on the front door (in my mind), then on his window and then on the window unit a/c , three taps each.   A few minutes later he appeared, saying he was awoken by a tapping sound at his window.  NOTE: There are bushes outside his window, farther than can be reached to knock.  Oooo eeee ooooo

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