make explode blow up (run out of file pointers)
\file{1}
\file{2}
\file{3}
\file{4}
\file{5}
\file{6}
\file{7}
\file{8}
\file{9}
\file{10}
\file{11}
\file{12}
\file{13}
\file{14}
\file{15}
\file{16}
\file{17}
\file{18}
\file{19}
\file{20}
\file{21}
\file{22}
\file{23}
\file{24}
\file{25}
\file{26}
\file{27}
\file{28}
\file{29}
\file{30}
