ARGUE:
Version 1: The fingers go up and down together:






Version 2: The fingers uses an alternating movement.




Interesting note: I found that when I signed version 2 to myself "off camera" I tended to open my mouth and cover my bottom teeth with my tongue. (Which is to say, my tongue was touching the back/inner part of my lower lip but not protruding out of my mouth. But I didn't use the tongue in the first version. I'll have to video other people signing these two versions and see if anyone else does that.
American Sign Language University ASL resources by Lifeprint.com Dr. William Vicars