+=head2 C<unwind @values, $level>
+
+Returns C<@values> I<from> the context indicated by C<$level>, i.e. from the subroutine, eval or format just above C<$level>.
+The upper level isn't coerced onto C<@values>, which is hence always evaluated in list context.
+
+=head2 C<want_at $level>
+
+Like C<wantarray>, but for the subroutine/eval/format context just above C<$level>.
+