Define "miracle"

[mazin]

Teacher: Johnny, define "miracle", please.

Johnny: There are no miracles, sir!

Teacher: Imagine you climb a 100 meters tall tower, you fall on your head and you survive. How do you call it then?

Johnny: A coincidence, sir.

teacher: Well then, and if you climb the same tower for the second time and you fall on your head again and you survive?

Johnyy: I would call it an extraordinary coincidence, sir.

Teacher (a bit frustrated): But if you climb it again, and you fall, and you survive for the third time, then how would you call this?

Johnny: A habit, sir!