Time: 18:40 GMT
Frequency: Without fail
World name: Cactuar
Character name: Sylviana Clawbriar
Class/Level: 60 MCH

Steps:
1. One player begins an action with a cast time, such as Hot Shot under the influence of Gauss Barrel. This also includes non-combat actions such as Return or Teleport.
2. A second player requests a trade with the first.
3. The cast is broken and a trade request is sent immediately.

A note that this action can and has been used to harass players, and has resulted in suspensions in the past.