Convertible Top, to glass or not to glass

[DenverSteve]

Originally Posted by ChrisZang

You will get very soon get used to the smaller window and not having to "karate chop" the window: priceless

Chris, Who does this? I've hear references about the "chop" for years but have neither seen it done, nor done it. I'm on my 4th Porsche and second Boxster (3 of 4 have been convertibles) and I've never contemplated or performed any manual manipulation when lowering my top at a stop light or in the garage. Where does this come from?