Large collapses at Bacon Rind

From email: "My partner and I went out to Ernie Miller today via the standard bacon rind uptrack. On the traverse across the moderate terrain, we experienced many whumpfs, some large enough to knock snow out of trees. We went up to about 9100ft on ole Ernest and dug a pit, performed an ect, and got  p propagation all the way across a layer maybe 4-6 inches above the ground at 25 whacks. On the same whack (the 25th), a layer about 12 inches above ground also collapsed and propagated across."