The VC10 does this as well...or maybe it is the cracks in the wings?
VC10 Display Routine:
Pitot Heat: On
Pitot Heat: Off
...so it can't be intentional.
Where is BEagle?
I will never forget the departure from Brize bound for the US , someone spotting the leaking wings, quick dive back to Brize...and the crew jumping off first leaving 130ish ICSC(L) studes wondering what is going on.
It was pure comedy.
G