revert some changes

code/modules/mob/living/carbon/human/species.dm

@@ -1303,6 +1303,8 @@ GLOBAL_LIST_EMPTY(roundstart_race_names)
 		if(ITEM_SLOT_FEET)
 			if(H.shoes)
 				return FALSE
+			if( !(I.slot_flags & ITEM_SLOT_FEET) )
+				return FALSE
 			if(num_legs < 2)
 				return FALSE
 			if(DIGITIGRADE in species_traits)

code/modules/mob/living/living.dm

@@ -47,8 +47,6 @@
 	return ..()
 
 /mob/living/proc/ZImpactDamage(turf/T, levels)
-	if(SEND_SIGNAL(src, COMSIG_LIVING_Z_IMPACT, levels, T) & NO_Z_IMPACT_DAMAGE)
-		return
 	visible_message("<span class='danger'>[src] crashes into [T] with a sickening noise!</span>", \
 					"<span class='userdanger'>You crash into [T] with a sickening noise!</span>")
 	adjustBruteLoss((levels * 5) ** 1.5)
@@ -755,8 +753,7 @@
 		return pick("trails_1", "trails_2")
 
 /mob/living/experience_pressure_difference(pressure_difference, direction, pressure_resistance_prob_delta = 0)
-	playsound(src, 'sound/effects/space_wind.ogg', 50, TRUE)
-	if(buckled || mob_negates_gravity())
+	if(buckled)
 		return
 	if(client && client.move_delay >= world.time + world.tick_lag*2)
 		pressure_resistance_prob_delta -= 30