so..there is no way to use "this event" instead of event id? okay.
also, this didn't worked for me, sadly :( I used check condition $gamePlayer.hasThrownEvent(1, 16, 12) on position 16,12, and placed an event with ID1 on that spot and didn't worked. I have no idea why.
Edit: but I can manage this by <pickup event: A>, and conditions on that "A" page. Thanks!