Nice fish - but think they aren't the real julii. These should be trilineatus (many LFS sells them as julii because they are labeled incorrectly in the wholesale).
Whatever they're called, they're cute little fish - you've done well!
What do you think they were watching? Could they see the reflection of the TV off the back of the tank maybe? You're right, they look like tey've all parked up at the drive-in. Great shot!