It’s gotta be from the 80-90’s period , i cant have been more than 10 or 12 when i saw it . It’s about a leech or some creature like that which attaches to people and drains electric charge from them (?) . It grew larger the more it drained , I remember in one scene it came out of a tree and landed on someone and started to drain them but it was removed somehow and left a burn or scar mark on them . I seem to remember the creature was defeated in a power plant or something of that nature . Any ideas ?