0 0 0Actions Report Solution You can earn this trophy during chapter 9. Once the combat sequence on the train begins, you'll be able to pick up grenades as in the rest of the game. All you need to do is throw one inside a vehicle.Don't try to target a motorcycle - you can't land the grenade inside one, so you'd need to get very lucky with the timing. Aim for a 4x4 or a larger transport truck instead. (For the latter, you'll be aiming at the bed in the back, not the driver's cab.)