In case you blow a blob with a blue bomb and it keeps hugging the wall while falling unconscious, there are chances (or not) of it regaining its senses before dying and then start lurking at the bottom portion of the stage, making it impossible to kill (and, therefore, impossible to continue playing).
Though it is very unlikely to happen, MT preferred to not risk so they put spikes there, so that, one time or another, the blob will hit it.
Take that as a True.
The next poster has a birthday party to go today.
