Someone didn't pull it out in time.
Some douchebag forgot to pull it out in time.
Carpet burn
To the water, it is time! Or in french... ... BWA HA HA HA. OK... I know this is kind a dad joke but.... yeah (for those don't speak French and thus don't get this, click the link and click the speaker to have it read to you ;) )
When their time is up.
You pull down their gene's and have a look! Credit: I heard this from an older gentlemen today at a senior home.
Because it was accidental.
An idiot who forgot to take it out earlier.
In all 3 cases, someone forgot to pull it out.
Failure to pull out in time