Woah is a word that can also be directly used in scenarios that are goofy, stupid, dumb or obscure. The h sound is often extended depending on the severity of the situation or how dire it may be.
Example 1:
"Hey man I failed my math test..."
"Woah"
Woah adjectiv, ˈwoʊʌ is used in a situation, in which a person does something that isn’t something a subjectivly normal person would do. Examples are Weird food combinations, having a weird music taste