1. It is not humanly possible to tap and release that quickly.Originally Posted by Chris Atkinson
2. Tapping the buttons, can cause some inconsistent resposnes. I'm not sure which models or modes. But Lardy was trying to demonstrate this with a 500 G2 and couldn't do it but he could with his 500 XLS in momentary. Sometimes he'd get a nick, sometimes nothing. It didn't seem to do it in continuous mode.
3. Trying to tap a High, which is both buttons, is even more complicated and inconsistent.
Hope that helps.