Could he turn it by degrees so gently and imperceptibly that those in the room would notice nothing? 
Could it be done in a way so minor that nobody would notice?
Could he turn it quickly enough to get away?
A man is making a hand gesture outdoors.
A train is leaving the station without passengers.
I did not play any golf when I was in college.
Tom?¡s de Torquemada was never a historical figure, he died at the age of 23.
a dog does swimming
My cat is very well behaved when left alone.