twice about what might be going on inside each trailer park you drive past -- even if it chiefly inspires you to drive a little faster 
(ROOT (S (ADVP (RB twice)) (PP (IN about) (SBAR (WHNP (WP what)) (S (VP (MD might) (VP (VB be) (VP (VBG going) (PRT (RP on)) (PP (IN inside) (NP (NP (DT each) (NN trailer) (NN park)) (SBAR (S (NP (PRP you)) (VP (VBP drive) (PP (IN past))))))))))))) (, --) (SBAR (ADVP (RB even)) (IN if) (S (NP (PRP it)) (ADVP (RB chiefly)) (VP (VBZ inspires) (NP (PRP you)) (S (VP (TO to) (VP (VB drive) (ADVP (NP (DT a) (JJ little)) (JJR faster))))))))))
(ROOT (S (ADVP (RB )) (PP (IN ) (SBAR (WHNP (WP )) (S (VP (MD ) (VP (VB ) (VP (VBG ) (PRT (RP )) (PP (IN ) (NP (NP (DT ) (NN ) (NN )) (SBAR (S (NP (PRP )) (VP (VBP ) (PP (IN ))))))))))))) (, ) (SBAR (ADVP (RB )) (IN ) (S (NP (PRP )) (ADVP (RB )) (VP (VBZ ) (NP (PRP )) (S (VP (TO ) (VP (VB ) (ADVP (NP (DT ) (JJ )) (JJR ))))))))))