Went in to have step 2 of three to have a cracked molar replaced with an implant. So I'm in the chair...BP is unusually high 146/88--well they ARE going to put a titanium deck screw up into my jaw AND stab me with a mondo needle. My heart rate is at 62 bpm. So surgeon comes in (we get along real well) and making small talk as his asst. gets torture stuff ready. I tell him watch this--and proceed to do my pre-dive Zen thing. Down goes heart rate to 58, 55, 52, 48 and bottoms at 46. All in about 60 seconds. He freaks and says that's one of the most interesting physiological displays he's ever seen. BTW BP goes down to 120/72...until the F*@$(^g mondo needle comes out. Anyway--how low and how fast can y'all lower your BPM?