On driving my vehicle one day I found that the clutch engagement felt really soft as compared to how it normally feels, its a little mind boggling since it was grabbing hard the previous day up to when I parked it up at night.. but it definitely feels as though the clutch is worn..gear shifts are really smooth now, there's almost no feel of engagement unless I pop the clutch on an upshift.. what could cause this? Did someone steal my vehicle that night and ride the clutch all night before returning it?

but in all seriousness, could there be something wrong that is causing the clutch to feel so dead all of a sudden?