I am working on a set where an actor falls into a bed and then activates one of those soda/mentos geysers. I need to come up with a way to make carbonated blood and also have to figure out placement so the customers don't end up soaked. Also thinking about using a bottle of orange soda and activating one out of the top of a jack o' lantern. I think a 25' geyser of pumpkin innards might be a little shocking.