Yeah... I feel your pain. Was once walking to Falkreath from the Hearthfire home. Was walking along the road by the river, and a spider just suddenly jumped out from behind the rock-wall-thing. Two feet in front of my character. And I was in first-person. I don't understand why the f*** they put a Random Encounter spot back there, but it's been spiders for me more often than not. I'm getting really sick of this game's insistence that spiders have to be absolutely everywhere.
I'm never wrong. I thought I was once, but I was mistaken.