Cool. Thanks. I can't really understand the "difference between classical geodesics and Bohmian trajectories" that seems to underlie their point, but interesting connection to Shulgin. Shulgin hypothesized that the "red shift" we see in astronomy that most people take as evidence for the big bang is actually not a doppler like effect of distant astrological matter rushing away from us (still under the effect of the initial big bang explosion) but is actually a result of time speeding up. Not exactly analogous to McKenna's quickening pace of novelty but similarly interesting idea.