Wouldn't surprise me if he did. I bet he stands on the side-lines listening to deafening silence from the crowd and wonders where he is. Add to that the CL anthem booing, mass exoduses on 80mins, etc., etc.
It's probably the complete opposite to what he's previously experienced. He's probably not used to having to attempt to get the crowd going (to no avail) and asking fans to do their bit.
Not sure what the equivalent game for Barca would be compared to City v Watford or Burnley, but I dont think the atmosphere would be electric.