Candlelit Vigil

When I got home, yesterday evening, Bob was out in the garden with a load of tea lights placed around the garden. I asked what he was doing and he said it was a candlelit vigil for his tortoise. He asked if I wanted to join in but I declined. "What's happened to your tortoise Bob?" I asked. He said that during the night, a Bigfoot-type creature had come into the garden and stepped on the tortoise, pushing it into the ground and killing it. I asked how he knew it was dead and why he thought a Bigfoot had killed it. He replied that he didn't dare dig it out to check and said he didn't know what else would be heavy enough to push the tortoise into the ground. I know by now that it's pointless to try and argue with Mr Bob about his strange ideas, so I went in and left him to his vigil. I think the tortoise had simply dug himself into the ground to stay warm because it was a bit chilly a couple of nights back.