Those things scare me too. I have never understood why they fit a trigger lock, would like to remove the one on mine but modifying something without understanding why it's there sounds like a way to end up on this page.Inspired by the recent post by Keith 66 ( a stupid accident) it’s got me thinking of some of the accidents I’ve had in my years within the building and construction world over the last 40 years or so. I personally believe that anyone who goes public with an accident and opens themselves up to criticism is actually helping others to learn from these accidents and hopefully prevent others from working in an unsafe manner or environment. So deep breath from me- about twenty years ago I was working in West Sussex and lodging with a fellow engineer In lancing. We cleared there garden , removed the old concrete and sheds etc and installed a 20’ x 30 raised deck and the remaining ground was then to be slabbed. All went to plan the slabs were laid and the last row needed to be cut . No probs I said -I’m going home this weekend so I’ll bring my angle grinder back with me . That’s where it went wrong- I retrieved said 9 1/2 inch grinder and decided to test it before leaving. Some of you will now pick up on where I went wrong and broke just about every safety rule in the book . The grinder was in a black back previously used for plaster, the guard and side handle was missing, I was wearing trainers , no gloves and I was in a rush to drive the 200 miles to lancing . What happened next was just a few seconds of panic and mayhem . In went the plug into the kitchen socket , it instantly started ( it was on trigger lock ) it kicked out of my hands and hit the floor spinning and attacking everything it came into contact with including my foot . 3 hrs in a/e ,a severe gash in my big toe , and my sister’s kitchen was a mess, the washing machine fridge freezer and cooker were all victims. It could of been a lot worse as the cut to my toe happened as the spinning grinder fell onto my trainer -I think it was the direction of the blade that actually meant the grinder cut my toe on impact and then the rotation took it away from the rest of my foot . I’ve never forgot this incident that was my own stupid fault but every time I operate any tool or machinery I check check and check again. Thanks for reading..