Goku fails to kill Frieza with it, and kills Kid Buu with it.
But most importantly of all, it takes over 9000 episodes to form.
WOAH! Did you just see Goku "kill" Frieza with the Spirit Bomb?!
Picollo:I'll hold frieza off!
100 episodes later...
Frieza:The fuck is that?
Picollo:The spirit bomb missed!
Bro #2 : Did what?
Bro #1 : It's been builing up for 17 years but i finally relised my Spirit bomb
Bro #2 : OH YEAH!!!!
~Bro's high 5~