I dont know if the song has additional meaning now that i think about it, seems like the bass player is fully concentrating in holding a dump, thats why he is so static
View attachment 767775 you know, one of those times when you need to let go the tension but you are with friends or at work and people are talking to you and you only half-listen to what they say because you only want to go to the "toilette" so you need wait a little and start to breathe deep and slow and with calculating mobility because dont want to disturb what is coming, hmmm yeah ....there is a scatological probability there
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About the Trigun music, i cant find any similar, i was sure there was but nope @_@
Sounds like a doom metal type song but i will keep searching