when it reminds you how pertinent its dynamics remain 
(ROOT (SBAR (WHADVP (WRB when)) (S (NP (PRP it)) (VP (VBZ reminds) (NP (PRP you)) (SBAR (WHADJP (WRB how) (JJ pertinent)) (S (NP (PRP$ its) (NNS dynamics)) (VP (VBP remain))))))))
(ROOT (SBAR (WHADVP (WRB )) (S (NP (PRP )) (VP (VBZ ) (NP (PRP )) (SBAR (WHADJP (WRB ) (JJ )) (S (NP (PRP$ ) (NNS )) (VP (VBP ))))))))