In a nonchalant manner, by ignoring the existence of a past event and pretending that nothing abnormal had occurred.

or even less. at most.

(informal, usually humorous) Used as a reply to see you, see you later, see you soon etc., implying that if the speaker sees the interlocutor first then the speaker will avoid the interlocutor.

If I have correctly remembered the details.

Used to introduce one's opinion about something to which offence could be taken

Many problems are happening simultaneously or in close succession.

Used to introduce one's opinion, without being asked for it.

(obsolete) Contraction of if it.

Please, kindly; used in giving a non-concrete instruction. / So to speak, like; used to indicate that a description is not standard. / Used in conceding a description.

(informal) Used to express acceptance of something offered to the speaker.