Seeing a character who falls on the floor or who is knocked against a wall described as having been struck by the wall or floor in Hammett’s work a couple times, my ears perked up when I saw it in Faulkner’s Pylon too, knowing he and Hammett to have been friendly. But probably it is not so uncommon to express things like that. Pylon (originally published 1935) page 103:
“Yes!” he cried. “Yes!” flinging himself backward and crossing his arms before his face at the same time; at first he did not even realize that it was only the floor which struck him until he lay prone again, his arms above his face and head and looking between them at the feet of the parachute jumper who had not moved.
.i`` * ^ / . . . . . ` `~ 