The Attack specific Switch within Boomerang says that for "After the Resolution step of this Attack, perform Bounce once......" If the Active player rolls may he perform Bounce once for each pair of ? This would allow two Bounces and each to a different Target. Some players make the analogy to Mushashi's Ken no Sen where we already have a ruling that the Attack specific switch of is not cumulative and does not allow two more Attacks if the Active player would be lucky enough to roll . However we know that Mendoza may apply for each for his Attack specific Switch within Flamma Veritatis. A ruling by @-V- would be helpful.
Switch of Mendoza is simply: one , one . Koorie's Switch is like Miyamoto's or Wild Bill's and it's stated in the FAQ: