For me, a "trackless trolley" is like hearing an airplane being called a "waterless boat" 
With a steering wheel, it's a bus to me; a no-battery electric bus 
..with a really cool cord 
I caught the IB refrence in the YT comments. I saw John Kay a few times and IB when some of the old Steppenwolf was playing with them, but not until the 80s and "stadium stuff" not in a "nostalgic" theater setting of any kind. Though I did get my first copy of IGDV from a soon to be Nun as a gift after pushing a car out from under a flooded viaduct ( along with a lot of other music you would not exactly expect a soon to be Nun to be familiar with; like early Pink Floyd and Frank Zappa's "Freak Out" {more sounds than music}... oh, and Black Sabbath 
; She said "If you listen, the songs are just warnings". I like a kind of unusually wide range of music, but "heavy" has really been more my thing since then 
