Last year, my cat toppled over one plant, she was a decent size too, about 48" tall, and she snapped right in half! Not completely through, but broke in half, and I got a straw, took a razor and sliced it down the middle and wrapped it around the stem, like a bandage. Within 5 days, it was completly healed.
What was kind of neat was that where it broke was about double the thickness of the rest of the stem cause the plant was concentrating on that one spot.