A possible Alien reference
I was listening the Alien director's cut commentary and Ridley Scott talks about the seen where Ash is running in place to stretch out his limbs. Scott explains this as an idea he had that androids had the tendency to have their limbs would kind of tighten up. This, at first, gave me the thought of something like Roy when his hand would clench up. This sealed the connection when Scott refers to Ash as being "a replicant, basically".
I thought this was kind of an interesting, if subtle, relationship between the two films. I've always viewed Blade Runner as being a sort of prequel to the Alien universe. They share a lot of similarities stylistically (for obvious reasons).
-Shotaro Kaneda
"Implants! Those aren't your mammories. They're somebody else's. They're Tyrell's niece's."