Certainly the notion of mustard seed growing into a great tree is my favourite absurdity. At least it became so when a Christian asked me what a mustard tree looks like. I thought what??? You read what where? Oh, well I think Jesus was prone to a little exaggeration for reasons of theatre. A humorous chap no doubt.
Fact number one: There is no contemporary references to Jesus.
I disagree, when I was in high school, class mate had a naked man dance on her lawn saying I am Jesus. Apparently he had escaped from the local sanatorium.