I have not tried it but I have read a lot of posts on here. If you do it right it is not painful at all and you lose consciousness in 5-15 seconds. For some people it is easy to find the sweet spot on the neck to pass out fast, others can never manage to do it. There are A LOT more attempts than success stories though, a lot of people here have 10+ failed attempts due to SI. It is almost impossible to suppress the SI