Everything seemed quite normal at first. :)

Everything seemed quite normal, at first... "at first" is a preposition http://www.northland.cc.mn.us/owl/comma_rules.htm You set it off with a comma to emphasize the feeling "at first." New grammar rules state that prepositions should come first and never at the end of a sentence. The grammar style of a preposition at the end is more in the form of a children's "Easy Reader" and is not proper in adult speaking or writings. http://en.wikipedia.org/wiki/List_of_English_prepositions Properly, it should read, "At first, everything seemed normal."

Everything seemed quite normal, at first... "at first" is a preposition http://www.northland.cc.mn.us/owl/comma_rules.htm You set it off with a comma to emphasize the feeling "at first." New grammar rules state that prepositions should come first and never at the end of a sentence. The grammar style of a preposition at the end is more in the form of a children's "Easy Reader" and is not proper in adult speaking or writings. http://en.wikipedia.org/wiki/List_of_English_prepositions Properly, it should read, "At first, everything seemed normal."

"Everything seemed quite normal at first?" or, "Everything seemed normal at first?"