Hey there, being a bass player who is mainly into extreme metal I was trying to figure out how to play 'Stripped, Raped and Strangled' by Cannibal Corpse (sorry if the title offends anyone!) and I was able to get most of it down with ease - until I noticed a riff that just stumped me. If you have heard the song I will try to describe, two high notes that both guitars and the bass do towards the beginning of the song before the vocals kick in. It sounds like two hand tapping but very rapid and inhumanly fast! I couldnt get my head around it so I asked a guitarist friend and he said 'ah well, thats just a trill' which I know the term and musically what one is - but I have no idea how to produce one on the bass and how to go about doing it...does any one have any suggestions?