Modelled off a black house spider, this easy to print spider is perfect to freak out that loved one of yours.
Bilby 3D PLA
Be quick to bend the legs.
If you want to make the spider more realistic you have a small window to do so straight after you take it off the heat bed to bend the legs. You probably could do this after by heating the legs back up with a heat gun (suggested by Oldcrow66) or with some boiling water (be careful), but its still pliable straight off the bed.