DS used to HATE the shower. he screamed when water touched his face.
When he was a baby, he screamed if he touched the grass at all.
Nappy changes were HELL!
He freaks about heights and still is very cautious to this day (he's nearly 5 and a half now).
He held a piece of watermelon and just went off - freaked and threw it.
He used to freak out brushing his teeth.
He has toe walked since the first day he learnt to walk and still does often.

There are so so many more behaviours he had/has, but he has gotten a lot better at dealing with everything. He brushes his own teeth now and showers no worries. He walks bare foot on grass. He explores heights a little more, but still overly cautious. He finally tries foods now and although he gags and nearly vomits, he at least tries.

As I've said, this is only the tip of the iceberg when it comes to some of the behaviours that concerned me. I'm about to PM you with a couple of links for some helpful checklists etc.