Sonic 3's incredible laser dance sequence was all Jim Carrey's idea, of course
Briefly

In our early conversations, it was one of Jim's requests... Jim wanted to dance again. Of course, we had to not just have him dance, we had to go big, and really go for it.
We immediately brought in these amazing choreographers and this dance team. Of course, Jim wanted to do everything he could, but there was no way he could do everything, especially since he's dancing with himself.
We very quickly learned that the more we threw in there, the harder it became to understand their movement... it was very much trial and error, just what's the right amount of lasers.
Read at Polygon
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