Why not vs. Popcorn walking feed

This Why Not (86277) vs 5-Count Popcorn (a6667 or 86867) walking feed pattern is a good starting point:

• A passes straight single passes to B and crossing single passes C. B responds with crossing passes and C with straight passes. For every passer, the passes to one person are always straight and the passes to the other person are always crossing, even after walking and relabeling.
• B has a slow self during the walk, written as a 7 (highlighted). This is not a pass, but a self. The extra beat is needed to switch to the other side of the pattern (similar to the extra self in ambled patterns). The speed difference between a 6-self and a 7-self often washes out in practice.
• C starts with the opposite hand to A and B.

This and all other patterns with an even number of beats for A are fairly well behaved: Hands alternate and the pattern repeats with the same starting hand on the second iteration after relabeling (e.g. A’s last throw from a left hand is followed by a right-handed throw as B). It is hence fairly short.

A longer version

When the pattern has an odd number of beats for A, the pattern has a left side and a right side (like Bruno’s and north-wall takeout patterns). That is, hands alternate throughout, but in the second iteration everybody starts with the opposite hands. For example, A’s last throw is left-handed, so their next throw as B would be right-handed, opposite of how B starts in the first iteration.

This was also used for extra-club Bruno’s nightmare, an odd-length sequence for A with a 7 (slow self) for the walk for B. See that pattern and corresponding explanation at https://ckaestne.github.io/modernpassing/5d-moving.html