This is an urban myth. In order for a sleeping person to swallow a live spider there would involve many highly unlikely circumstances. There are no formal scientific or medical records of anyone ever swallowing a spider while sleeping.
30 years
what an absurd question.
The average heart beats around 345,632,391,283 times per lifetime according to average dieing age of 85.
swallowed a spider and feel some slight pain inside
There is a widely shared myth that claims the average human eats eight cockroaches in their sleep over their lifetime, but this is not scientifically proven. In reality, it is unlikely that a person would consume that many cockroaches unknowingly.
you eat about 7-8 a yearActually it's a myth. There is no scientific or medical proof that spiders crawl into humans mouths as they sleep. It's not 4 spiders a year and it's not a pound of spiders in a lifetime, it's just plain untrue
A human will sneeze millions of times during their lifetime. There is no way to count exactly how many actual sneezes will occur.
On average, a human uses about 1.5 trees worth of paper in a lifetime, which amounts to around 8,000 pieces of paper per person per year. This estimate can vary depending on factors such as occupation and lifestyle choices.
Very few... Spiders are instinctively terrified of anything that reminds them of predators, i.e. mammals and birds. Therefore, they shy away from body heat, movement, breathing, and other normal signs of a human. Anyway, there aren't many spiders in your bedroom, and those that are are usually in the shadowy corners, not in your bed. For a more detailed source, go to http://www.straightdope.com/columns/read/1828/does-the-average-person-consume-four-spiders-per-year-in-his-sleep
It is estimated that a human can learn and understand around 20,000 to 35,000 words in their lifetime.
There is no concrete answer to this, but the commonly cited statistic is around 8 spiders per year. However, most of these are not swallowed intentionally, as spiders tend to crawl back out once they realize they are not in a suitable environment.