Two things I learnt from that video - Rex doesn't like playing slowly or playing sitting down 😄 It's a shame it ends when it does, he's just starting to relax towards the end.
Rex was a MASSIVE influence on me as a teenager, for me he is probably the king (forgive the pun) of metal bass. To this day, when I'm working on heavier music, I'm frequently in a "WWRD?" frame of mind. That Floods bassline... absolute chef's kiss.
And also - The Great Southern Trendkill is the greatest metal album of the 90s.