If timed correctly, a trident will be struck by lightning as an item and / or burnt by the fire that comes with the lightning strike if the doFireTick gamerule is set to true.

This is related to MC-176919, and caused due to the « fix » of MC-125254.

This is very easy to cause unintentionally in vanilla survival : one only needs to strike a lightning rod next to them and die from the strike.

This could be intended purpose.