Combinations of type of poker in tournaments?

It may not be technically possible, but are there tournaments where you can play a different type of poker per hand? For example combinations of Hold'em and Omaha? So first hand Hold'em and 2nd hand Omaha? Or even more fun, first hand is an all-in heads-up to halve the field right at the start?

there s8 game on poker stars , but its not per hand, more like every 8/10 mins (don't quote me on that ) . But that's as close as you get to such a format.