So I did it! Thanks Tartan for the suggestion. I put a big towel underneath, held my finger on the spot I didn't want it going past and sprayed with a water bottle (on stream so I could aim!) ... and it worked like a charm!
Thanks again!
Here's a pic so everyone understands why I couldn't just use 'x's to cancel it out ... a bit too confusing
[ATTACH=CONFIG]607674[/ATTACH]