Single human footstep stepping into squishy mud.
Single stamping footstep of person's work boot on dirty ground.
Footstep. Boot sliding to a stop on a dirt surface.
Single footstep in crumbling, crunching snow.
Single human footstep wearing tennis shoes crunching heavily on rock salt or crisp snow and ice.
Single human footstep stamping onto marble tile with gravel.
Single footstep of boot stamping down onto a dirt and wood debris surface. Crunch.
Single human footstep with hard sole shoe steps down onto a soft hollow wood surface.
Single human footstep wearing tennis shoes stepping on hollow wood floor.
Single footstep crunching down onto a surface of crinkly plastic debris. Snaps and cracks.