It's a strange impulse, but he's used to the buildup of tension.

What strange impulse made me pause in passing, I wonder?

I had this strange impulse to make the trip wonderfully terrible.

Or, more accurately, to her own strange impulse to join them.

Had someone put it out for him on some strange impulse toward economy?

How do I know what strange impulse might come upon her?

I was filled with a strange, mad impulse to be near her.

She moved forward and by some strange impulse, for no order was given, we all began to move after her.

This 70-year-old woman would have been a teenager during the war, and I had a strange impulse to touch her.

Some strange impulse coming to us from outer space.