User blog comment:Snapdragon717/Top Ten Most Threatening Zombies in HttDR/@comment-24024415-20160220011532

Insta-freeze wind without many counters, Surfer Zombie: Land Edition, Jack-n-the-knock-off , unfairness, firey death, animal massacare, TWICE, squish and squash.

All cases above are brokeb beyond belief, as their main weakness is speed and proximity prevention by other plants. Here, portals outright shoe-horn them in to make many unbalanced zombies with terrible gameplay reprocussions.