Today I'm going to demonstrate to you how to do a one-handed tie. Here I have two pieces of colored string knotted at the end, and a sandbag. You can practice this technique at home. So I'm not gloving gown, because this is a non-sterile environment. This is just to show you how to get the hang of a one-handed tie. Lift up my sandbag, tuck the suture material underneath my sandbag. I have the red suture coming from the top of the sandbag into my left hand, where I grasp it with my lower three fingers. I then tuck my thumb underneath the red suture. And that makes a one. It's not why it's a one-handed tie, but that's how you can remember it's a one-handed tie. Then in my right hand, I have the yellow suture, here, fairly taut. I bring it up to my index finger. Bend my index finger underneath the red suture. When I straighten my index finger, I bring my thumb around onto my index finger, grapping the red suture. Letting go with the rest of my fingers, pull the red suture towards my body. First throw. Then the three fingers of my left hand, I keep together, wrapping down towards my throw. You can see the tension in the red suture. Bring the yellow suture up to my middle finger, bend my middle finger underneath the red suture. Now when I straighten my middle finger down through the loop, I bring my fourth finger of my left hand on top of the red suture, pull it through the loop. And there is your square knot. Now again, for demonstration purposes, I will do the one-handed tie at the speed you will be doing it at.