Happened to me a good 15 or so times over 22 years playing. Sometimes a bit of a shock, always played on every time. Never felt the needed to go to hospital. I have heard a few have and mostly out of caution but once again never have I come across anyone with permanent sight loss to any degree due to a BB fragmented through mesh. Even the few hot gun close up incidents I've been told about and been privy to. You would need to be point blanked with a very hot gun for a BB fragment to carry enough energy to cause any serious damage. These 2 incidents where they with the woven type mesh rather than stamped/perforated sheet? As the woven texture splits BBS more readily than stamped sheet.