I just found out that gabe newell did a rick and morty commentary

Don't know if this has been talked about before, but on season 2's 2nd episode, gabe newell and friends did a guest auido commentary (see the season 2 dvd with rick wearing a graaaaaass tastes bad apron, also insert obligatory half life 3 comfirmed joke)

there were also guest commentaries in the first season's DVD.

please link me to where this has been talked about before if this has been talked about before.