Pushbutton launch control?

I seem to remember reading somewhere that the pushbutton trans can be used as a sort of "launch control" by loading it up and drive and dumping the brake. I don't remember the specifics, and I'm sure it's horrible on the trans, but is this true? Is this just a figment of my imagination and poor reading comprehension ;-)
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loading the convertor / All dragracers do that to a certain extent ! some more some less , depending on what their running . Or did I misunderstand what ur saying?