One thing in the OP concerns me. The phrase about " I had my 40C in my pocket......." Hopefully that 40C was in a pocket holster, protecting the trigger from accidental contact and possible unintended discharge.

Early this year a local guy had his Glock in his coat pocket and got shot in the femoral artery and bled to death in front of his family. Now, the M&P trigger isn't that of a Glock, but you MUST have the piece in a holster that protects the trigger. In his case, the seat belt