OK, who watched Bear's wild weekend with Ben Stiller last night on channel 4. Here if you missed it. http://www.channel4.com/programmes/bears-wild-weekends/on-demand/60926-001 Anyway, Bear left Ben with a "BG" Knife to harvest some limpets with the instructions to stick the knife under the limpet and try to prise it off. If you want to skin your knuckles or possibly stab yourself yes that would be the route to go down, but there is a easier safer way to remove them. When you find the limpet do not touch it. Even the slightest touch the limpet will clamp itself on the rock becoming extremely difficult to remove. Take a Blunt object, Rock, Stick whatever and without touching the limpet give it a sharp dunt, the limpet wont have enough time to react and clamp on to the rock and comes off very easily. if you are removing seaweed to expose the limpet do it slowly so as not to give the game away.. Cheers, Happy limpet hunting.. Oh and Ps, I have seen this on two TV programs in the past couple of weeks, The Time Team and Last nights show. When you cook the limpet it will slide easily from the shell. There is a black bag under the muscle part, Personally i wouldn't eat that part as did Ben and Phil on Time team, Yuk! Dont know for sure but i'm guessing that's the crap or digestive system bag, disregard that part and eat the big meaty part with the horns. A bit rubbery but it's a meal at the end of the day and if you add some garlic it's a good un. Enjoy.