No, Really, Don't Do That With Your Pistol

Texting while driving is bad.  Shooting yourself while driving is even worse.

Fox 2: Man accidentally shoots self with unholstered pistol while driving on I-94

The fellow had a CPL, but apparently lacked the sense to carry in a holster. He apparently then "shifted" the firearm while driving and shot himself in the leg.

No information is provided as to what kind of pistol it was, but I'd suspect it was a striker-fired pistol of some sort, and with the trigger unprotected by a holster, he likely nudged the trigger enough while moving the firearm in his pants to cause it to fire.

Firearms and holsters are like peanut butter and jelly - a great combination and one is not great for carrying alone by itself without the other. 

Shoving a firearm down your pants without a holster to protect the trigger is highly sub-optimal.  

Then playing with it as it likely moved from where you shoved it as you don't have it in a holster makes it worse.  That messing about with it opens opportunities for you to discharge it in a manner you would not expect nor desire. In addition, not having it in a holster and having it move about as it may will cut down on your ability to effectively access it should you need it to protect your life - having to find it after it has fallen down your pants leg and potentially got stuck there probably doesn't give you quick access to it at your moment of need.

If you carry a gun, have a quality holster for it that not just protects the trigger but also protects you and keeps the gun where you placed it so it doesn't go flopping about just anywhere.  

If you can afford to carry a gun, you certainly should afford to carry it in a decent holster.  The leg (or other body parts) you save might be your own, or your passengers, or an innocent in another car.