Worst-Case Wednesday: How To Cross a Piranha-Infested River

Would also apply to "How to get to the Boardroom". See e.g. blood in the water.
From Quirkbooks:

If you are going to certain parts of South America this year for your summer break, and are likely to be around freshwater rivers, this advice may come in handy if you find yourself in a situation where the only way to survive is to cross a river full of flesh eating fish.

Hopefully, you will spend your break having a good time, seeing some beautiful sights and relaxing by the pool, but just in case, The Worst Case Scenario Survival Handbook: Travel, can help you out. And read on to win a copy!

1. Do not cross if you have an open wound. Piranhas are attracted to blood.

2. Avoid areas with netted fish, docks where fish are cleaned, and areas around bird rookeries. Piranhas may become habituated to feeding in these areas and may become more aggressive there.

3. Stay out of waters when piranhas are feeding. When large numbers of piranhas are attacking prey – a true feeding frenzy – they may snap and bite at anything around them. If you see them feeding, stay away, or well upriver....

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