jbm@Foucault:~/Code/perl
$ ./javafan.pl 
Can't open perl script "!m": No such file or directory
jbm@Foucault:~/Code/perl
$ perl -v

This is perl, v5.10.0 built for darwin-thread-multi-2level
(with 2 registered patches, see perl -V for more detail)

jbm@Foucault:~/Code/perl
$ cat javafan.pl 
#!/usr/bin/perl  -- !m
;;;print "Just another Perl hacker";
s
;"rekcah lreP rehtona tsuJ" tnirp;;;
m! --  lrep/nib/rsu/!#