User blog comment:GeneralOwnage55/What is your idea for a new plasmid?/@comment-1330314-20100508001858

I think it's because a lot of people are thinking about making plasmids at the same time, and usually they think along the same lines. Since they don't check each other's post, they end up accidentally ripping each other off.

Also, bump with content:

Small & Tall: Allows you to adjust your size, and is able to shrink you to the size of a doll or become tall enough to dwarf even a Big Daddy. Shrinking increases your speed and jump power, and also lets you use passages you'd be too big to go through otherwise; however your health and damage output will decrease. Growing increases your health and damage output, but slows you down and prevents you from jumping. However, trying to jump will cause you to stamp on the ground, sending a shockwave that throws nearby Splicers into the air.