Complex sentence: Although its just them playing along, it seems that the band added in train sounds also of note is that in the beginning someone says "Come on ride, the Hamburger Train!" which then shifts into Les' groovy bassline.
Split into simpler sentences: Although its just them playing along, it seems that the band added in train sounds. Also of note is that in the beginning someone says "Come on ride, the Hamburger Train!" which then shifts into Les' groovy bassline.