When fizzing a bass through the mouth be sure what's extended isn't the esophagus. Swim bladders are a little behind and above the stomach, and are likely to press the stomach so it inverts through the esophagus. You need to be sure you puncture deep enough to get into the bladder. While doing that from the mouth or side, avoid puncturing the liver, which sits atop the bladder, or the intestines below the bladder. Study this anatomical drawing before trying it. If you puncture only the esophagus or stomach while not actually relieving pressure in the bladder, the expansion is only re-directed to other organs, or the stomach is filled with gas.
http://www.floridaconservation.org/Fishing/Fishes/anatomy.html
I highly recommend dissecting at least one bass to learn the difference between bladder and stomach tissue.
I see that a lot when winter fishing over 50' deep. I'll use 60' for this example. If the fish seems to be a heavy-weight, I'll play it slowly and let the fish swim to the surface if possible rather that dragging it up there. A bunch of tournament folks won't do that, it being a time eater. If it happens to you and you don't plan to keep the fish, return it immediately to the depth it came from. There are fish release gadgets you can buy, but all I use is some trot line and a large lead sinker. I run the line through the lip (never the gill slit!!!) then let the fish into the water after tying the tag end off on a cleat. If it doesn't swim down immediately, play the line out until the length let out matches the target depth. You get about 6' with outstretched hands, so ten stretches gives 60'. Tie a loop knot in the line at the 60' mark, and attach the sinker. Let the sinker and fish sink by slipping sinker line, tag end still tied off. Once the sinker reaches 60' release the tag line end (the line that exits the lip and was tied to the cleat). Pull the sinker up letting the tag end slide through the lip. You know the sinker is at 60' because you counted hand stretches while playing more line out as the sinker sinks, so now you have 120' total of doubled line before releasing the tag end.
Ah, but in these parts most of those fish end up eaten, so few anglers bother. Sure the tournament folks might try something to keep the bass alive to weigh-in, but by far the majority of non-tournament folks figure on taking every bass they catch home. I know the state's DNRs report a very low percentage of harvesters, but the folks that do that are rarely if ever interviewed. I've seen the voluntary questionaires at tournament weigh-in sites, but nobody I know, including myself, has ever been interviewed, so the harvesters are not being counted.
Make the best decision you can under your circumstances.
Jim