A Really Slow Grocery Checkout Person

when there is only one lane open at Martin's and Dorothy is the checker. - K.H.

I just want to check out and be on my way
But I see there's just one line open today
And glory be
It's Dorothy
So slow, when I leave, fifty more strands of gray.

People Behind Me are Called to New Checkout Lane

Dervish, when I am waiting on line (usually in the supermarket) for my turn to check out and a new register opens the young clerk often does not take the next person in line. Am I invisible or what?

A new line opens
She calls the man behind me
How does that make sense?