I watched a couple of shows at the Toronto Fringe Festival, and I really enjoyed the imrpov in Scratch. (See mini-reviews and showtimes in Eye and NOW.)
For the performance, the audience provides a loose structure and theme. Arlen Konopaki and Kevin Gillese generate an assortment of characters into a fractured Hollywood plot. They then mix in lots of physical comedy, a few puns and hilariously awkward situations. The duo keep the juices flowing by inserting flashes to previous moments, and they were often trying to outdo each other in their outlandish ideas. In the final scenes, when all of the plots get mashed up together, the entire audience was laughing after almost every line.
The Fringe Festival continues for another week, and shows are only $10.