4 minute free trial

Blazoned in big lettering on a massage parlours door is a sign that yells "4 minute free trial". 

1. Do they pull out all the stops in those first 3 minutes to really WOW you nice and early?  

2. What happens once the 4 minutes is up? Does a timer go off? Are you given an option? 

3. Has anyone ever walked out after 4 minutes? If so why? 

4. Can you truly make your mind up on the quality of anything in 4 minutes?