An unusual benefit to a webinar

I watched a previously recorded webinar today for reasons of continued educational credit to maintain a professional certification (project management - PMP).   Ironically 3/4 through the presentation I happened to note the sound of a vibrating cell phone in the background.  LOL.  While I had a unplanned chuckle of that, it would always be advisable to validate your entire environment when giving a presentation to ensure professionalism and your integrity.