Sasae tsurikomiashi is a prime example of otoshi in judo. Notice that the throw happens right on the footfall, mostly inline with uke's feet, and produces a cartwheel-type airfall - all characteristics of otoshi motion. Both of the following videos are superb.
Also of interest in the second video, there is some resistance or hesitation for just an instant on the part of the uke, and this hesitation gives the throw a guruma-type motion (remember how guruma happens an instant after otoshi?). As uke begins to cartwheel he attempts to withdraw for just a moment and this starts him log-rolling through the air. This is more visable in the slow motion segments toward the middle and end of the second film.
Patrick Parker, is a Christian, husband, father, judo and aikido teacher, Program Director for a Cardiac Rehab, and a Ph.D. Contact: email@example.com or phone 601.248.7282