A conditional plus 미치다 'go mad'. Usually it is hyperbole for wanting something badly or losing patience: 난 Phở만 보면 미칠 것 같아 'every time I see pho it drives me crazy', 그 파트만 되면 미치겠는 거예요 'that part just kills me'. The particle 만 'just, merely' is common in front — …만 보면 is 'the moment I so much as see it'. It can also be literal: 들어가면 미쳐버리는 감옥으로 유명하죠 'famous as a prison that drove inmates mad'.