Unfortunately, that is not really viable as a setup, considering you can easily block the low since you have plenty of time to see the animation while tech rolling off the floor. It does catch people off guard if you are doing a long combo and hit them with u2 and then go straight for the full charge low. But the only situation where it is truly guaranteed is after HBS 1+2. One situation that you can catch people with it is at the wall after the wall combo. You can do the fast version or df3,2 as a 50 50 mix if they tech. If the low catches them, you can go into HBS 1+2 and get a full combo, which leads to death with both bears
