Achievement

Definition
Achievement is a type of situation (or state of affairs) that is dynamic and has no conceivable duration in time.

English

 * win, find, recognize, discover, leave, lose, finish, start, stop, begin, catch, arrive

Example sentences:
 * The bomb exploded .
 * He found the keys.

Comments
Achievements rarely combine with the progressive aspect, as they designate very short, instantaneous situations, which do not allow a continuous interpretation.
 * I noticed/?was noticing his new hair cut.