In discarding, the play of a high and then a lower card reverses
the original meaning of the discard. If you adopt the strength
discard, and wish to throw away your weak suit at “no-trump” do so by
discarding first a high and then a lower card. If you use the weak
discard and wish to protect your weak suits, discard first a high and
then a lower card from your strong suit.
The reverse discard may be used when it is shown that two discards
can be made.