Taegeuk Four symbolizes the ancient philosophy of Thunder. This form breaks away
from the rigid movement of the previous forms and is considered the first advanced
poomsae. The form makes use of a more fluid motion and introduces two-handed
techniques as well as the Hammerblock. The short or walkng stance is almost
eliminated at this point with the exception of being on the two stances to the sides of
step three. In addition, Taegeuk Four uses a backwards sliding parrying movement.