There are actually different ones for different level ranges. At 40+ you have to pan way back and be outdoors but there are some fireworks!
P.S. Yes that's me getting level 50 while stunned. Shaddup. 
Awww that was me getting to 50 to and I completly missed the fireworks? Guess I'll just have to do it all over again 
I *just* got 50 tonight... I had no idea that that was there! >,< omg <;.;> I missed it...
I guess I too shall have to do it all over... darn <^,~>
I got a nice screen of the leveling effect, just thought I'd share it.
Ding!.