-는 것 봐, literally 'look at the ~ing', is an exclamation pointing at what someone or something is doing, usually with amusement or disbelief: 눈 떨리는 것 봐! (look at his eye twitching!), 소스 남는 것 봐...! (look at all that sauce!). Six of these lines are that shape. One line is a different thing entirely — in 들어가는 것 보다 나가는 게 더 아파요, 보다 is the comparison particle 'than', not the verb 'look'.