I was bitten by a spider about 4 years ago, don't know what kind it was but I will never forget the experience.
I was getting the lawnmower dusted off and put my hand under the mower to inspect the blades. About an hour later I noticed a white spot on my left hand that began itching. I became very thirsty so I went to get some water in the kitchen.
I remember opening the refridgerator and seeing the light inside as VERY blury. I layed down on the couch and became very dizzy and nausious...then drowsey.
I woke up about 3 am and my head felt like it was going to explode. I walked out the front door to get some air and as I opened the door, our cat bolted into the house ( she often did this) and it scared the crap out of me. I jumped forward and up to get over the cat and it was then I noticed. I had jumped alright, but I now found myself about maybe 30 feet in the air as a result.
I landed hard, but vigerously and looked down upon my hands, both trembling. I had, in fact, become spiderman and nothing would be the same for me ever since.