Most helpful bug/glitch in game?

[iggorrr! (:]

When i first played this game many years ago i found it quite hard and i don't think it was something much more different for other players too :D

''Luckly'' this game was quite full of unusual bugs/glitches which made game easier and a lot more interesting or even harder, depending which one you encountered.

What was your most helpful bug/glitch?

I really loved that poor pathfinding for enemies. Just equip bow, take 1000 arrows, find rock with texture that blocks monsters from climbing on it and clear forest