You won't raise eyebrows with a trainer unless you drive halfway up a long climb, park your car by the side of the road and then sit on your trainer so you can do a TT up the second half. hehe. I did last last week on Mt. Diablo because the second half of it works better for uphill TT's than the first half...and didn't want to tire my climbing muscles by going up the first part. I found this to be a good way to meet guys though because they all wanted to know what I was doing.