[rhelgeby]

If it were just floor friction, I'd expect players to slide longer the higher push force you apply (as stuff would in the real world). Instead of floor friction it might be a sliding distance cap, so that you'll stop after a certain distance. The stop is smooth, so it seems to decrease speed at a rate depending on the max slide distance and player speed.

If there is a cap on slide distance, it might be possible to modify it - unless it's hard coded.