Was playing zed and repairing some turrets when i noticed that i continued to shove even after i let go of the key/button did a bit of testing and found out that if i aim right after the shove animation finishes it caused another shove. it does need to be timed well to do. another fun thing about it is you can after the second shove stop aiming re-aim and it will shove again. more difficult to do on a keyboard, easier to do on a controller. not sure if this is a zed only thing, i think i got it to work once on sweeper but it was mid wave and so i couldn't pay attention it is definitely easier to do on zed