Guys this card reads ¨΅"when a figure ACTIVATES you can interrupt to perform an attack with a vehicle." When exactly can i interrupt the other players activation? Start, between 2 actions or at the end of avtivation?

very beginning of the activation

As soon as your opponent activates a figure, before it did anything yet

ex.

opponent activate Vader

You say "hold it! I'm going to play OW"

the same goes for multi-figure activation groups like jet troopers: you decide which figure (ex. opponent done with Stormie #1, you play OW as soon as your opponent activates Stormie #2 and kill off Stormtrooper #2, opponent activate Stormie #3, end-of-activation)

The guys are correct. "When a hostile figure activates" is "at the start of a hostile figure's activation".

Ιt should clarify AT THE START OF ACTIVATION....we played it wrong.....

29 minutes ago, topacesteve said:

Ιt should clarify AT THE START OF ACTIVATION....we played it wrong.....

It does, by using the word 'activates'. If it was any time it would say 'during another figure's activation, interrupt to...'