Hello,I’m working on a game (actually i’m just training so it’s not really a game),what can you do well bassicaly you use some Jutsu,right now i’m working on Fireball jutsu (inspired by Naruto) well i made the script everything works fine but when i make the jutsu,the fireball appears (it’s ok) but the fire is going down,i added AddForce and it’s seems like is going forward for a little time and then is going down again,so can somebody helps me?
A good start is to use a useful topic title when you want help. Nobody will give you an answer when the thread is named help me. The second thing, please avoid yelling like using big or fat letters. This distracts everybody who is willing to help too. And the third thing, you should watch your grammar. A wall of text without any breaks or useful signs is too hard to read. And will also distract potential helpers.
Hope that helps 
About my grammar,I’m not from America so English is not my first language,this is why my grammar is the way it is,anyway thank you
Are you using gravity with the rigid body?
If so try turning it off and perhaps adjusting the mass.
Thank you,problem fixed.