I believe in superstitions so I search about "APOLLO 13"
check this information and decide if you believe or not :

Apollo 13 was the seventh manned mission in the american apollo space

program and the third intendedto land in the moon. The craft was launched

on April 11, 1970 at 13:13.

The landing was aborted after an oxygen tank exploded exploded two days later,

crippling the service module upon which the command module depended.

I believed that 13 is a bad luck number.
Decide :)