1) Fluky 2) Well timed 1) Lucky 
[adj] - being lucky in finding things you were not looking for
serendipitous 1. To come upon or found by accident; fortuitous: 'There have been many serendipitous discoveries in science.' 2. A reference to, or suggesting serendipity. 3. Good; beneficial; favorable: 'It was serendipitous weather for our trip to Italy.'
adjective lucky in making unexpected and fortunate discoveries
[Difficult words] lucky in making unexpected and fortunate discoveries