Piloting a military helicopter can be dangerous business. You could come under fire by enemy aircraft, or one of COBRA’S rocket turrets. In such an occasion, you’ll need to take advantage of a quick exit. An ejection seat should do the trick!
. . . except for the small problem of flying into the rotating blades, thereby decapitating you in a highly comical manner.
Now, it’s true that the ejection seat could launch you out of the side. They can also jettison the rotor blades before shooting the person skyward. Neither of these possibilities have been implemented in a mainstream fashion, however, because they are viewed as too costly and unreliable. Those that do use them (such as the Kamov Ka-50) tend to have pilots who drink ten cups of coffee a day and have recurring dreams of funerals involving an equal number of caskets.
When they’re in an emergency, most helicopter pilots just have to find a way to safely land their craft upon the ground. Not an easy task, but slightly better than having your body parts scattered across a three hundred foot radius.