Fixes mech jetpack allowing breaking time and space

code/game/mecha/equipment/tools/jetpack.dm

@@ -48,6 +48,43 @@
 	if(!action_checks())
 		return chassis.dyndomove(direction)
 	var/move_result = 0
+	if(direction == UP || direction == DOWN)
+		if(!chassis.can_ztravel())
+			chassis.occupant_message("<span class='warning'>Your vehicle lacks the capacity to move in that direction!</span>")
+			return FALSE
+
+		//We're using locs because some mecha are 2x2 turfs. So thicc!
+		var/result = TRUE
+
+		for(var/turf/T in chassis.locs)
+			if(!T.CanZPass(chassis,direction))
+				chassis.occupant_message("<span class='warning'>You can't move that direction from here!</span>")
+				result = FALSE
+				break
+			var/turf/dest = (direction == UP) ? GetAbove(chassis) : GetBelow(chassis)
+			if(!dest)
+				chassis.occupant_message("<span class='notice'>There is nothing of interest in this direction.</span>")
+				result = FALSE
+				break
+			if(!dest.CanZPass(chassis,direction))
+				chassis.occupant_message("<span class='warning'>There's something blocking your movement in that direction!</span>")
+				result = FALSE
+				break
+		if(result)
+			move_result = chassis.mechstep(direction)
+
+		if(move_result)
+			chassis.can_move = 0
+			chassis.use_power(chassis.step_energy_drain)
+			if(istype(chassis.loc, /turf/space))
+				if(!chassis.check_for_support())
+					chassis.float_direction = direction
+					chassis.start_process(MECHA_PROC_MOVEMENT)
+					chassis.log_message("<span class='warning'>Movement control lost. Inertial movement started.</span>")
+			if(chassis.do_after(get_step_delay()))
+				chassis.can_move = 1
+			return 1
+		return 0
 	if(chassis.hasInternalDamage(MECHA_INT_CONTROL_LOST))
 		move_result = step_rand(chassis)
 	else if(chassis.dir!=direction)