We have all been taught how to deploy a flashlight when simultaneously holding your sidearm. Though some techniques are better than others, having to hold a flashlight in conjunction with shooting your sidearm increases your chances for missing your target.
I recently saw a technique employed by 30 year plus veteran electrician that allowed him to work with both hands while still directing his flashlight where ever he needed it. Upon seeing him use it, I felt it had a definite place in a police officers “tool bag” when conducting room/building clearings. When waiting to going inside a building during a planned search and/or entry, take out your flashlight and stick it into the collar of your shirt (behind your neck) at an angle so the light end is sticking out over your support hand shoulder, as close to that side of the head as possible. Just before you make entry, use your support hand to reach up and turn on your flashlight. Now you can proceed through with your search with both hands on your gun as you were taught and have general room lighting (reflective off the ceiling) that goes wherever you go.
If you need to direct your light at a particular location, all you do is role your shoulders forward, drop your head slightly and you will be able to direct the beam without having to take your hands off your sidearm. This technique is not meant to forever replace what you are familiar with doing. It does have it limitations, such as the officer losing their ability to quickly turn on and off their flashlight at their discretion if flashlight discipline is an issue when used. It is meant for you to try and see if it will help you in certain situations you encounter. Granted, it is awkward at first, but once you get over your own skepticism (and the chuckles), hopefully you will see the value in this technique.