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.
Step 1 of doing a backbend against a wall is to make sure the space is clear around you. 
( z1 ensure :ARG1 ( z2 clear :ARG1 ( z3 space :location ( z4 around :op ( z5 you ) ) ) ) :ARG4-of ( z6 step :ARG1 ( z7 do :ARG1 ( z8 backbend ) :location ( z9 against :op ( z10 wall ) ) ) :ord ( z11 ordinal-entity :value 1 ) ) )