The heredoc joost used is quoting for his shell, not perl. Put the following in a file (443263.pl, in my case) then run it using the -x command line switch.

bla bla bla ignored

#!perl

#stuff_to_execute();
print "Hello, world!\n";

__END__

bla bla
[download]

Output without -x:
C:\S>perl 443263.pl
syntax error at 443263.pl line 6, near "ignored"
Execution of 443263.pl aborted due to compilation errors.

With -x:
C:\S>perl -x 443263.pl
Hello, world!
[download]

see perlrun for details