Situational irony is a literary technique in which an expected outcome does not happen, or its opposite happens instead. Situational irony requires one's expectations to be thwarted and is also sometimes called an irony of events. The outcome can be tragic or humorous, but it is always unexpected.
Past tense is a grammatical tense used to describe an action or event that is done in the past. "Mixed" has a regular form "mix" and by adding "-ed" to it, it becomes a past tense.
