During the 1991 British Grand Prix race weekend at Silverstone, U.K., someone was flying a flag with the Ferrari logo that had an additional, shorter flag attached to its edge, as shown in this frame from around 1:18:30 in the the 2021 documentary Schumacher:
I can't be sure, but it looks as if this may be an "official" flag put up by the venue or the race management, as it's attached to the structure of the stands (note that the pole, extending from the stands rail, also carries what looks like a loudspeaker).
The design on this second flag appears to be the "CHC" logo of the Montreal Canadiens ice hockey team, particularly as used on the home game uniform:
What's going on here? Does this logo also have some significance in racing, or for this particular race? Or is this just a fan randomly sewing flags together?