Alistar headbutt
 

Hey a few games ago I was fighting an Alistar and as I was about to die in team fights he would headbutt me away, lol I know right? Anyway I was curious with flash and headbutt. Is it okay to flash ahead of the enemy and headbutt them back to your partner in a lane to then stun and kill the enemy? Is there better uses for headbutt beside the one I just asked about?

Its good for peeling attackers off your carry too, or knocking problematic mellee champs away from your team in a scrap. Using it to steal kills from your team if its clear that the kill is already secured is pretty weak though.
You have to be careful with it though, as when your learning Alistair its easy to knock an enemy outside J4's ult (instead of into it) or through a wall in the jungle during a gank

What you actually do is flash on top of the champ, pulverize (so you have time to properly position), then headbutt them into your team. If your pulverize is on cooldown in a team fight, take advantage of your passive to walk through units to get behind the champ and headbutt him into your team.

Another use is to push champs away from your squishies or to push them into AOE ulti's (like Nunu's or Galio's).

What you DON'T do is try to use headbutt as a finisher or else most of the time you just push them to safety just like that Alistar in your game was doing.

Been a while since I've played or even seen Ali. Can you still headbutt to your opponent and pop him up before he flies away? Being good at that makes Alistair dangerous regardless of position.