Mission Mode is what Eggman goes into when his PINGAS gets a boner. Any water that Eggman touches while in mission mode becomes boner water, slightly toxic bubbly water.

There is also a small chance (to be exact, 0.000000001%) that Eggman automatically gets all the chaos emeralds when he touches boner water when he isn't in mission mode. But of course, the boner water is made when he IS in mission mode.