years ago I was crappie fishin w my girlfriend at local resivior,sitting on the large riprap near a bridge beside the boat ramps.we were across the channel from the ramps 200yrds or so.ramp kinda busy.7/10 people back a brand new tall, 25+ cabin cruiser type boat down and take about 25 mins to launch.it was obvious they had very little if any exp.with any size boat.they finnally go to leave and plow as bad as possible away from the ramp and under the bridge.small boaters fishing near us yelled at the captain to slow down but he was oblivious.we had to move up the rocks to avoid 3/4' wake!about 20 mins later boat comes back and circles around in front of ramp,a little slower this time,still to much wake.a guy is standing on the bow probly 6/7 ft above the water.they turn and head for the Rip rap about 50' from us and dont really slow down!!I think the guy thought his boat had brakes!he hits the riprap w a sound like thunder pitching the rider onto the riprap and nearly running him over as the big boat rode up the slope!!it slid back into the water.they pick up the bleeding injured stuntman and they turn to go back to the ramp. it was full/crowded and as they circled the boat started to list!!it became apparent to the crew it was sinking fast. only smart thing they did that day was beach it on the sandy shore beside the ramp!can you top that!