There is film of Ginger Baker keeping 3/4 time with his left hand, 4/4 with his right, 7/8 with his left foot and 12/8 with his right.
And it actually sounds good. Especially when he brings it all back to 4/4 for the crescendo.
If that’s not multi-tasking, I need to be further educated.
https://www.youtube.com/watch?v=UJefbp-s9LA
Steve Gadd used to do something similar. I speak Drum, but not as fluently as those guys.