( it ( ( is ( like ( ( viewing ( his music ) ) ( through ( a ( moving ( convex mirror ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP it)) (VP (VBZ is) (PP (IN like) (S (VP (VBG viewing) (NP (PRP$ his) (NN music)) (PP (IN through) (NP (DT a) (VBG moving) (NN convex) (NN mirror))))))) (. .)))
it is like viewing his music through a moving convex mirror.
(ROOT (S (NP (DT A) (NN convex) (NN mirror)) (VP (VBZ is) (VP (VBN shaped) (PP (IN like) (NP (NP (DT the) (NN outside)) (PP (IN of) (NP (DT a) (NN bowl))))))) (. .)))
A convex mirror is shaped like the outside of a bowl.