diff --git a/source/application.cpp b/source/application.cpp
index eda75c4..0d3318f 100644
--- a/source/application.cpp
+++ b/source/application.cpp
@@ -561,25 +561,34 @@ namespace gmtk
 		sink(world, c, m);
 	}
 
-	void destroy_tile_entity(map & map, ecs::handle entity)
+	std::optional<card_type> destroy_tile_entity(map & map, ecs::handle entity)
 	{
 		auto acc = map.world->get(entity);
 
 		if (acc.contains<source>() || acc.contains<lab>())
-			return;
+			return std::nullopt;
+
+		std::optional<card_type> result;
 
 		if (acc.contains<crossing>())
-			map.put_card(card_type::crossing);
+		{
+			result = card_type::crossing;
+		}
 		else if (acc.contains<zoomer>())
 		{
-			map.put_card(card_type::zoomer);
+			result = card_type::zoomer;
 		}
 		else if (auto t = acc.get_if<transformer>())
 		{
-			map.put_card(transformer_to_card(t->type));
+			result = transformer_to_card(t->type);
 		}
 
+		if (result)
+			map.put_card(*result);
+
 		map.world->destroy(entity);
+
+		return result;
 	}
 
 	void clear_tile(map & map, location const & l)
@@ -1490,10 +1499,16 @@ namespace gmtk
 								{
 									built_sound();
 
-									destroy_tile_entity(map_, *entity);
+									auto dcard = destroy_tile_entity(map_, *entity);
 
 									place_card(map_, *active_card_, *selected_);
 
+									if (*active_card_ == card_type::zoomer && dcard)
+									{
+										map_.take_card(*dcard);
+										place_card(map_, *dcard, selected_->down());
+									}
+
 									active_card_ = std::nullopt;
 
 									auto e = map_.world->index<path_index>().get(selected_->down());