MESSAGE #420 - A BRAIN TEASER

One day a man left home.
He turned right
and ran straight ahead.

Then he turned left.
After awhile,
he turned left again,
now running
faster than ever.

Then he turned left
once more
and
decided to go home.

In the distance,
he could see
two masked men
waiting for him.

Who were they?

What was the man doing?