The giant goblins from Demon's Souls World 5-2.
They're big, they hit hard, and their hits can knock you down. That on its own isn't so bad by the game's standards. HOWEVER: they appear in a level that is a giant swamp that saps your mobility. Stand in the swamp, and you move more slowly and, if I remember correctly, lose your ability to roll. There are some spots of dry land where your mobility is normal, but they are pretty small. In short, face one of these dudes and you can quickly be stun-locked, since with time it takes to stand up after being knocked over and your inability to move quickly in the swamp, the giant can just knock you right down again. They're best dealt with from range, which is a real annoyance.
They're big, they hit hard, and their hits can knock you down. That on its own isn't so bad by the game's standards. HOWEVER: they appear in a level that is a giant swamp that saps your mobility. Stand in the swamp, and you move more slowly and, if I remember correctly, lose your ability to roll. There are some spots of dry land where your mobility is normal, but they are pretty small. In short, face one of these dudes and you can quickly be stun-locked, since with time it takes to stand up after being knocked over and your inability to move quickly in the swamp, the giant can just knock you right down again. They're best dealt with from range, which is a real annoyance.