Good Morning Sprinkles. xx

Saturdays riddle answer was - Any animal because houses can't jump
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Yesterdays again in case you missed it.

You won't want to deal with me
Without having privacy
Just one size of me fits all
I am there to take the fall
If it's an emergency
You can make a run for me
Whether a stroll or a dash
At the end you'll make a splash
Be your stay prolonged or brief
I enable your relief

What am I?
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Todays is:-

You see a boat filled with people. It has not sunk, but when you look again you don’t see a single person on the boat. Why?

All answers on my back wall please. xx