How to send a hint to vehicle that activated trigger?

[SteelSampson 1]

So I'm using this in the on Condition field(Thanks to Larrow!):

this && ({ _x in thislist} count [veh1, veh2, veh3, veh4] > 0)  

How would I send a hint or message only to the players in the vehicle who triggered it?

[mindstorm 8]

condition:

(vehicle player) in thislist

onact:

hint "Hello";

if you only want the driver to get the hint

condition:

(vehicle player) in thislist && driver (vehicle player) == player