Eruption, too. The timing on the main tapping line feels weird, the stretches feel hard, if-not impossible to just 'drop in place' and when you actually do get them, having my hands stretched so much lock them up so that they don't want to release to open string when you descend. I've been working on that for like 20 years. Mind you, I'm a tapping guy. I could play most White Lion or Winger in my sleep but I can't play about 75% of Eruption at all. Another one for me is the ascending run at the end of the Bark at the Moon solo. Hard to sync up and down strokes for the string changes on that, in time and cleanly in one position muchless three.