Incredible scenes

There once was a man called Tyroo
Who switched between limerick and haiku
What a useless git

There once was a man called Tyroo
Backwards poetry of lines some wrote who
He should have been banned
Told firmly then and
Entirely things posting stop to

There once was a man called Tyroo
Who decided to have a new
Go at writing limericks. But although this one did rhyme
He committed the rather serious crime
Of getting the metre totally wrong the whole way through