Violent spin cycle on the Frigidare front-loading washer

I assume you bought it new, so on that basis, did you remove the transit packing materials inside the machine ?

Front loading washing machine normal design is for the drum assembly to be supported by two or more springs at the top, and two dampers at the bottom. This allows the drum to move in a controlled fashion and also minimises vibration, particularly during spinning.
When the machines are shipped from the factory, transit packaging is put inside the machine to ensure that any shocks to the machine during transit dont damage the springs or dampers. This must be removed before use otherwise you get pretty much the symptoms you describe.

The manual that cam with it will show you how to remove the transit packaging. In such a short time I suspect you wont have suffered any damage, but take the transit packaging out as soon as possible.