Nutmeg does this! She will dart under the bed but leave her tail sticking out!!!
Tibby does the exact same thing. It's kind of hard to miss that furry tail!
I like it when they get under the covers and think you can't see them. But how could you not see the huge lump in the covers. THen when I lift up the coverts they get so startled as if they didn't expect me to find them hiding under my covers.