Having built dozens of PCs over two decades, I have not had the experience you're describing in at least 15 years.
If this has been a recent experience for you, were you using an old case/enclosure, or a very inexpensive one?
If this has been a recent experience for you, were you using an old case/enclosure, or a very inexpensive one?
That thing was like an Indiana Jones trap in terms of slicing my hands.