On a trip and Of unsound mind

Of unsound mind and on a trip are semantically related. In some cases you can use "Of unsound mind" instead an adjective phrase "On a trip".

Of unsound mind adjective - Not of sound mind, memory, or understanding; in law, not competent to go to trial.

On a trip and of unsound mind are semantically related. Sometimes you can use "On a trip" instead an adjective phrase "Of unsound mind".