Totally normal. Although if you are worried about Autism, it wouldn't hurt to look up some symptoms just to reassure yourself that he's fine.

One thing I try to do with my 2 year old - any time she starts to throw a fit that we can't control, I remove her from the situation. Take her to another room, quiet, away from distractions, just to CHILL for a minute.

Sometimes it helps, sometimes she just spends 10 minutes screaming. I don't know if it's good or not, but it's a thought.

Just don't use the crib as the "time-out" spot because then that can make bedtimes worse if they associate the crib with punishment. Oh, and it's not punishment! Just helping them relax.