Why is the biochemical hotel crossing the line of fire stuck underground?

A fallen tree around the hotel, a small staircase (such as a stone), with several corners on one side of the staircase, is walking back and forth against the corner card. Because it is a new scheme, it is generally less than 10 second card (I used 6 or 7 seconds).

Advantages: it is not a dot, and it can walk freely.

Disadvantages: yes, only half of the body can't get into all the only children. Through technology, crayfish,

Attention! ! ! You can't forcibly escape to the hotel to block it. If you fall to the ground, you will directly fall or die.

Tip: Squat down, many a mickle makes a mickle. Time is with you, lobster

Completely original, = = handwriting typing is very hard, what to use?