'This might $look like a scalar, but because of the single quotes, it's not to be interpolated'

/\w+$/ # Looks like the scalar $/, but isn't.

"You owe me \$$money dollars!" # The first $ is escaped.

${$hello[10]}  # Which scalar do you want?

$hello[10] # Does an array element count as a scalar?

$hello{Fred} # Does a hash element count as a scalar?

@array = split /\$/, "Hello$world$here$I$come!";

$text =~ s/(.)(.+)/$2$1/; # $1 and $2 are scalars,
                            do you want them?