Be careful; sometimes seeing a "Z" is very
difficult. There is always someone directly side-by-side someone else,
or directly in front of or behind someone else. This is the 'bending'
point of your "Z". Reach forward (to the side) or behind (to the side)
if necessary to touch your partner in the "Z", but do not physically move
from your spot. Maintaining precise positioning is crucial! EN: 30