How to Use "doozy" with Example Sentences

1. But if something makes the market fall , the drop can be a doozy .
2. Watch out for that first step , it 's a doozy .
3. Watch out for that first step . It 's a doozy !
4. Oh , my god , this is a doozy .
5. Man , that english test was a doozy . I think I failed .