tilt acting up today, thoughts?

[tnltracy]

So we're cruising along en route to Newport Jazz fest today when suddenly the motor is tilted up about half way. Still in enough to run, but tilt trim button in operable.

Got to dock, and it went back down on its own. Seems to be working ok now, but cocerned about if it may happen again.

Anyone have any ideas, or seen this before? Its a 1998 Johnson 130.

Tom