Fumble / Critical Success Chart, Flanking Bonuses, and the Five Foot Step

Fumble / Critical Success Chart
A fumble or critical success chart is used when anyone rolls either a 1 or a 20 respectively. The links to the fumble charts and critical success charts used are hidden from the players as of currently until further notice.

Flanking
Flanking is where two friendly melee tokens surround an enemy token, such as the image shown below.

The three leftmost images are flanking and would receive the +1 attack bonus. The very rightmost image is not flanking, however, and will not gain any advantage.

When a token is flanked, the two tokens benefit in flanking the token by gaining a +1 on all attack rolls. Additionally, if the enemy token attacks and critically fails against the intended target, the flanking token will gain a free action attack of opportunity on the enemy token at no reaction cost. This adds on after the fumble chart's effects above.

Five Foot Step
By using all your movement, you may take a five foot step by moving 5 ft anywhere without provoking an opportunity of attack (AOO) on you.