Throw your Laptop and Knife and have them Appear to Boomerang back into your grasp. Unfortunately you only get the Laptop back, the Knife returning is only aesthetic.
https://www.youtube.com/watch?v=4Vk9Y_YrjSI&feature=player_embedded
https://www.youtube.com/watch?v=4Vk9Y_YrjSI&feature=player_embedded