I lived right next door to Eric Harris.
On April 18, 1999 - I heard loud noises emitting from his house.
Like the sounds of Eric sawing wood.
Eric has suddenly swung the garage door open, all the way.
Nobody else was with him and his parents were gone.
There was plywood and sparks.
I didn't make eye contact with him and he closed the garage door, soon afterwards.
That was the only disturbance, I would notably see from Eric's house before the shooting took place.