Scaffolding with normal blocks

When you are crouched and jumping backwards while holding down your place blocks button, the blocks have a chance to scaffold up about 10 blocks. I was in survival mode at the time. Also, while doing this scaffolding thing, you are stuck in the block placing animation unless you let go of your place blocks button. Here is a video on it. https://youtu.be/fD1xqHFjhfE