L'esprit d'escalier

She laughed, then scoffed, “Uhm, yeah, sweet shortbus guy,
It’s me who’s got the cards – right now – correct?
So now when someone calls we’re not so shy
To get the phone – so, spaz, show some respect.”
She’d obviously been saving all this stuff
And sorting it together in a file –
A megaton of words and quite enough
To leave me flabbergasted for awhile.
So my reply was no reply just then –
I blushed and watched her leave in all her might,
But thought, when I had time to count to ten,
“We took the bus together, retard, right?”
The Germans call such comebacks Treppenwitz,

Which is, I think, a rather tankless blitz.