Ingenuity Unlimited

When the windscreen is smashed, you just smashed it away.
Then you replace it with transparent plastic. But then, you
discovered your budget has gone out of the window because
you forgot to include the windscreen in your insurance. And
so, slowly, the plastic becomes dirty. And so, the cheapest
way is to "open" it, rain, rocks and dirt be dammed. Anyway,
you can't complain about the excellent ventilation it offers.

Wait till you get a fucking traffic summons, you idiot!