I've always put the pad in an antenna with electrical tape at the mouth so to not burn your lips. or put the pad in a rose glass stem. put the rock on the paid while holding it upright, hold the lighter to the outside part of the pipe with the pad so the rock melts into the pad.
then I start out hitting the pipe while holding it upwards, bringing the lighter back to the outside of the pipe where the pad is. (stop inhaling at this point). then bring the pipe straight and take the lighter back to the end and inhale. then bring thelighter back to the outside of the pipe where the pad is again, while not inhaling, and then hold the pipe pointed downwards and bring the lighter back up to the end and finish the hit.
then hold it in as long as you can, you should hear a whistle, or a telephone ringing, and then lots of bass, like if someone says something, it sounds all bassy.