Sending a player backwards

Hi, does anyone know how I could make a player get blown backwards slightly in the air and send the back about 5 - 10 blocks?
I know how to do it for going forwards with player.setVelocity(player.getLocation().getDirection.multiply(double here));
But, I can't figure out how to do it for the other way.
Thanks
- Loogeh

 

Negative value?

 

Didn't work.

 

Multiply their vector by -1 for example and add 0.5 to the Y coord and that should get you about what you are looking for.

so... multiply(-1).add(0,0.5,0)

Just remember that multiplying their current vector by negative 1 just uses the same speed they were moving and makes them go the opposite. So if they aren't moving, they won't get pushed back.

 

That worked, thank you