The items jumps after your mouse. The velocity is calculated by the velocity of your mouse and by the distance of how far away the item is from the mouse. So the further away an item is from your mouse the easier it gets to throw it to you.
If you take a quick look in the gameplay trailer you can see how you can transport stuff... (the audio of the video is not in sync so mute it :) )
And if you don't know how far or close the item is to the camera Press Y to switch the camera angle.