The scene that taught me as a child NOT to poke at unknown substances under any circumstances.
Unable to dislodge the goo, the now terrified hobo staggers out of the woods and into the nearby town in search of help, as the mass has begun consuming his flesh. What follows is a tale of escalation as the implacable titular entity mindlessly rampages through the small town, consuming victim after victim and turning strawberry red in the process (presumably due to all of the flesh and blood it absorbs) and exponentially gaining mass. The only ones who are aware of the threat are a number of local teens (all played by actors who are clearly too old for the roles, including screen legend Steve McQueen, who was 28 when this was released), and though they attempt to alert assorted parents and authorities, no adults believe them because it's the era of fear of "juvenile delinquency" and general mistrust of teenagers, and the local kids are perceived a pack of no-good hot-rodding troublemakers.
THE BLOB is not a full-on shocker, but it is packed
with memorable set pieces that demonstrate what a truly horrifying
concept the creature is. It's utterly mindless and unknowable, fueled by
an insatiable hunger, and its amorphous physiognomy allows it to use
through grates, under doors, you name it. It's also eerily silent,
wordlessly conveying its lust for sustenance. It's also notable for be
being (perhaps unintentionally) Lovecraftian monster, as it is cosmic in
origin and quite beyond our understanding. It's brilliantly realized
and could not be more simple. It's just a big, hungry blob of
space-jelly, and there's fuck all you can do to put a stop to it. Well,
that last part isn;t true, and when the solution is found, it's so
elementary and simple, it's absolute genius.