Alistar has several stuns that can disable and displace enemies. Headbutt will make an enemy airborne for 0.5 seconds, followed by a 0.75-second stun. Pulverize will throw surrounding enemies into the air for 1 second. In comparison, Trample can empower your basic attack so that it does magic damage and stuns for 1 second. Although Alistar has several disables, some of them can be a bit unreliable during teamfights.