this is incorrect, but I've gotten stuck on not one but several cases of rampant comment myths and this screenshot led me to it. etho first referred to his lp season 2 base as the man cave for the first time on October 26, 2011 in episode 112. scrolling through ep 112 comments, you will note:
two people pointing out the actual first time at 0:37
possibly the first comment bdubs ever made on etho's channel (to be verified; they did RFTW together approx. 3 weeks prior. it's the earliest I've found so far, and bdubs only has 27 comments on the channel with at least two of those being recent and getting hearts & one being etho drinks toilet water, which narrows the chances significantly.)
people asking about the creeper trick - the two leading theories are that creepers would not explode unless they were on the same Y level as the player, or that it's an exploit of the way glass panes could block mob line of sight. (etho used a similar trick with fenceposts a few eps prior, as the taller hitbox prevented a creeper from "seeing" him despite having clear in-game line of sight.) this has to be beta 1.9 prerelease 4 as prereleases 3 and 5 showed the version in the HUD, but I can't find any documentation of version changes that corroborate either theory. i will give a prize* to anyone who can confirm** this
people claiming this episode is the first instance of "go get your snacks," which is corroborated by ethopedia. however, as always, there are dissenters claiming LP s1 or earlier in s2 and it's possible the imperfect auto-captions didn't pick it up, so this earns a solid plausible rating.
with all that said, happy 11-year anniversary to the man cave and also the most consternating comments on any etho video.