Some sort of a half life?

When we went to Quepos in October, we crossed a small bridge.
Five days later, the bridge collapsed.

When we came back from Grenada last week, we crossed a large bridge.
Five days later, the bridge blew up.

Now I'm scared.

(In fact, when I searched "bridge" on my blog to find the October post, I discovered that bridges, their structural integrity and their lack in spots where you would really kind of expect to find one, have been a not-so-infrequent topic around here.)