How to do a backbend against a wall<br>Find a good, clear spot. Find a wall space that is clear of any obstructions such as furniture, plants or sharp objects. It should have nothing that could injure you near it.
Most people have sharp objects at their house 
( z1 have :ARG0 ( z2 person :mod ( z3 most ) ) :ARG1 ( z4 object :ARG1-of ( z5 sharp ) ) :location ( z6 house :poss z2 ) )