T-SQL Puzzle 3 - Syntax Behaviour

What will be the out of below SELECT statements:

SELECT 1.Columns
SELECT 1.ColumnName
SELECT (1.)ColumnName
SELECT '1.'ColumnName
SELECT 1.#ColumnName
SELECT $1.ColumnName
SELECT 1.[ a%^& .ColumnName]

Has anyone seen this behavior?
Do you have any idea what's happening?