Clubhead flies off at range

happened to me at the WARRINGTON AG drivetime range from the upstairs bays,had a new shaft fitted on my driver r9 couldn't wait to give the big dog a bone so picked up driver then straight to the range first ball fine second ball well it soured through the air in a kind of slow motion perfect arc,just a glint of sunshine glinting from the shiny surface then the sight of the head bouncing to the 150yd flag!!!!! the worst part was the pro announcing to a full 2 story 40+ bay range to stop playing as i had to walk out to retrieve it,i never knew us golfers were so cruel as the howls of laughter as i slowly trudged to get my club head still rings in my ears,the pro who fitted my shaft could only laugh when i told him,re gripped it for free for my embarrassment though.