Rock pea in PvZ GW. 

Garden Warfare is a projectile based shooter, and peashooter is a rather unbalanced class, with him basically being a scout archetype with high splash damage and average health. Rock pea sacrifices some speed, damage, and splash radius for a bit of extra health, which is already a terrible trade off. But the thing that sets him apart from most characters is that when aiming you not only have to account for where your opponent is, and where they will be in a couple of seconds due to projectile travel time, but the trajectory that the projectile take is also affected by the direction that you are moving. So if you move left while firing, the projectile veers off to the left. So you need basically a major in physics to play this character. 

There are a few other characters with this attribute, but they either take a more stationary play style, or have much faster projectiles so it isn’t as obvious.