For fun, Seymour decided to give a Venom 101 class on YouTube. One experiment featured a brain dead toad with a beating heart injected with venom from a jelly fish. We discovered having a white heart is a really bad thing. The pumping heart would tighten and relax until, turning a lighter color every time the blood was pumped out. When the venom was injected the heart started to lighten from the tip and then just stayed tightened.