Three years ago we were at a test day with my sons single seater at the start of the season, and on the first lap of the afternoon session the car suddenly turned sharp left straight into the barriers. The immediate concern over his personal safety was allayed when he emerged from the car, which was then ignominiously lifted back to the pits on the back of breakdown wagon. The next concern was why it had happened, he was very lucky to be unhurt! We found a broken rear shock absorber, and whilst discussing whether this was the cause or result of the accident, a guy wandered over and said he had seen it broken before Ian went onto the track - I THOUGHT YOU KNEW ! thanks, warning us might have saved an accident, personal injury and a lot of repair expence. So the question now is this, if you see anything that rings warning bells for any reason, whether at the track, in the workshop, or even on the FORUM, do you make the person at risk aware in some way that this may harm him, or do you look the other way and say its not your problem. OR DO YOU JUST SAY "I thought you knew, mate !