+=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.
+This means that
+
+ my $num = sub {
+ my @a = ('a' .. 'z');
+ unwind @a => 0;
+ }->();
+
+will set C<$num> to C<'z'>.
+You can use L</want_at> to handle these cases.
+
+=head2 C<want_at $level>
+
+Like C<wantarray>, but for the subroutine/eval/format context just above C<$level>.
+
+The previous example can then be "corrected" :
+
+ my $num = sub {
+ my @a = ('a' .. 'z');
+ unwind +(want_at(0) ? @a : scalar @a) => 0;
+ }->();
+
+will righteously set C<$num> to C<26>.
+
+=head1 WORDS
+
+=head2 C<TOP>