Continuity mistake: When Blade gets his serum, Whistler holds his hand, then they see the girl run. In one shot, Whistler goes right, leaving the suffering Blade. In the next shot (close up on Blade), you can see that Whistler is still holding Blade's hand. (00:26:57)

Blade (1998)
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Directed by: Stephen Norrington
Starring: Wesley Snipes, Kris Kristofferson, Stephen Dorff
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Blade: You better wake up. The world you live in is just a sugar coated topping. There is another world beneath it. The real world. And if you want to survive it, you better learn to pull the trigger.
Trivia: This film, along with 2000's "X-Men" and 2002's "Spider-Man," are often cited as the three movies that helped revive the comic-book-movie genre after several poorly-received 90's movies like "Batman and Robin" and "Steel" had effectively killed it for a few years.
Question: When Blade is getting ready to leave the morgue and Karen is lying on the ground after being attacked by Quinn, Blade is about to walk by and leave her there. However, a flashback of his mom reaching out for help appears twice, triggering Blade to save her. This represents his mom, which I understand. But his mom's death occurred in the opening scene or at the beginning of the movie, and Blade was only a baby. How could he possibly have a memory of that as an adult from being a baby? (00:14:35 - 00:15:03)
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Answer: I don't think it's so much a memory as it is Blade just equating Karen with his mother in that moment. The only way to convey his thought process to the audience, though, is to show his mother onscreen.
Phaneron