<Table> <Tr> <Th_colspan="3"> Vinyl--side A </Th> </Tr> <Tr> <Th> No . </Th> <Th> Title </Th> <Th> Length </Th> </Tr> <Tr> <Td> 1 . </Td> <Td> "Pumped Up Kicks" </Td> <Td> 4: 13 </Td> </Tr> <Tr> <Td> 2 . </Td> <Td> "Chin Music for the Unsuspecting Hero" </Td> <Td> 3: 26 </Td> </Tr> </Table> <Tr> <Th_colspan="3"> Vinyl--side A </Th> </Tr> <Tr> <Th> No . </Th> <Th> Title </Th> <Th> Length </Th> </Tr> <Tr> <Td> 1 . </Td> <Td> "Pumped Up Kicks" </Td> <Td> 4: 13 </Td> </Tr>

What is the meaning behind pumped up kicks lyrics