When the thrust is delivered to the flank, it is called a side thrust.
Although the flat fingertip and side elbow play the main part in
this technique, the forefinger and double side elbow are
frequently used too.

Forefinger
It is mainly executed from a sitting or X-stance and occasionally
from a close, one leg or parallel stance.

Side Front Thrust (Yobap Tulgi)
This technique is used for attacking an opponent approaching
from the side front.

Side Elbow (Yop Palkup)
This is also divided into single and twin side elbow. The former is
executed from an L-, rear foot or fixed stance and the latter from
X-, parallel, close, sitting, walking and one-leg stances.

Single Side Elbow (Wae Yop Palkup)
The philtrum and solar plexus are the main targets with the
floating ribs and chest as secondary. This technique is normally
performed in a sliding motion. Keep the back fist faced downward
with the thrusting elbow slightly raised at the moment of impact.

Twin Side Elbow (Sang Yop Palkup)
The targets are the same as in a single side elbow. Keep both
side fists faced downward at the moment of impact.
Side thrust
(Yop Tulgi)