I have played DOTA and i have many experience about this game and from many experience these are some  fantastic battle i've ever played

 Bloodseker

 Terran Marin VS Fountain, and in that I used Fun hero and Fun item

The fountain will be destroyed

 The fountain is destroyed

 The final result

 Razor or Lightning revenant

To active fun mode

To play in Fun mode you must check your map is there word "fun" or not, if your map there is word "fun" so when you play you can press enter at your keyboard and type "-fun"