“Ok, so I was just editing my latest montage and this huge spider came out, so I sprayed it and k

illed it, then this fricken alien worm came out of it!” – Baskwith2

This is a Mermithid worm, which is an internal parasite whose infective larvae enter spiders directly or via ingested food. They basically live inside of the spider and choose the right time to come out, near water.  The spider barely lives through this long journey until the worm busts out of it’s stomach.