Strange creatures

I was in my Dad's back garden with him and one of his friends. There were numerous insects crawling along the grass. All were very large and horrific looking. My Dad's friend decided that we would play a game.
The game was very simple. We would throw darts onto the insects to kill them. After about 10 shots of missing the creatures I decided I didn't like this game anymore and let them continue as they were very prolific.