Myself... if I am good that day.
Other than that, no one, unless it was an emergency... and even in that case, restricted to CERTAIN Viper Owners. There are very few people I would trust to treat it as if they couldnt replace it (and they cant, trust me... nothing to do with dollars), and that includes only a few of the guys around here. Others, both owners or not, I know for a fact would not be able to control themselves and/or I dont feel have good enough driving or even clutch skills to handle the car. All I would need is to find out someone either ruined my $5K+ clutch or lost the car shifting in a turn because the clutch locked the drivetrain when they sidestepped the pedal forgetting it wasnt exactly stock...
Ironically, I have this position while at the same time driving other peoples Viper's day in and day out of all horsepower levels. It goes along with the job (oh darn, ha) but at the same time my customers are well aware that "I have done this before" to say the least, and have more respect for these cars than anybody they have or will ever meet. I realize all to well the wrench time and dollars that go into putting humpty dumpty back together again if anything, either mechanical or accident were to occur, and I also know how I would feel for the same reasons if someone damaged my car.