Slide Underground?

We took our two local grandchildren into the park today, to give their mother some space for lots of the things she had to do. After the sand pit we headed to the big play area and had a snack next to this slide.

It looks to me as if the slide is going into the ground. I assume it is so a child's legs flop down off the end, and they can walk or run away. Today it was running as it was wet. In fact a father and young child went down and he staggered out in some pain. It was not meant for adults going down at that speed.  We weren't put off,as we weren't going down anyway!

Merry Christmas to  all of you, wherever you might be, and with whoever you might be with. xx