"Ahaha! As you can see, if you were planning on trying to stop us, you're too late, we've already turned ourselves into hippos. The serum worked!
Why hippos, you ask? ...Why did we choose hippos, Rachelle? What do you mean, it was my idea? Well...either way...it's obvious, isn't it? ...They're dangerous and respected creatures, with lots of insulating blubber! I think we had other reasons too, I don't know, I can't be arsed to keep track of all that stuff. The point is, our formula worked, and now we're stuck like this for the rest of our lives! ...Wait, is that what we wanted? Y-yes! Yeah, this is...nice..."