In another post I asked about two-handed vs. one-handed opens for folders. Part of the context was a pocket catch automatic opening mechansim like the Waverider or a ziptie, intended to open the blade by catching something on one's pants pocket as it is pulled out. The first time I saw one of these I thought it was terribly cool, but I've never owned one of my own. How well do they work? Can you rely on them if you practice it enough?