hehe this made me giggle!
I glad its not just my kitty that seems to want to go to the toilet when I'm trying to clean her tray!
As soon as I'd pick it up, she'd come trotting in, i'd have it half in the bin bag before she'd start scraping the puppy pads that I keep under her tray incase she slightly misses her target! I know she'll just do her business there and then if I don't hurry up so I usally have to frantically scoop the rest, refil and shove it under her bum, all the time I'm going 'wait! wait! wait! wait! wait!' These days I usually wait until shes just been or make sure shes sound asleep before cleaning it!