OK, so in DA, if I pull the trigger to rear to about 90% of a full trigger pull, and let of the trigger, the sear will trip. It will be as if I pulled the DA trigger 100%. If there was a round in the chamber, it would fire. It does not do this with the slide off.

In SA, if I can push the trigger forward of its normal SA position. Enough so that there is a tactile and audible click.

I can try and post a video, but it will be a day or two.