Tape Measure. A great, classic trick. Looks like this. That's all there is to it. This is a trick by Jon Gates, and it's been around for a long time. And it's a super-fun way to return the yo-yo. Don't throw it too hard. When you throw it too hard, you can get some snags, and it doesn't wind up all the way. But otherwise, the idea is just to let the yo-yo spin freely in Trapeze, and then just set it in your hand, and let the string just get sucked back up into the gap like a tape measure.
When you do this, a lot of times what you'll find is that the string is not perfectly in the gap, so when you throw out of it be really careful that you're not throwing into a snag. Kind of throw lightly to get out of it. Variations: you can lift your throw hand to your freehand. You can do that on both sides: one, two. Just a really fun way to end any kind of Trapeze combo where you end here, you just kind of set it and forget it!