Here's a great idea to make sure ALL THE BRIDESMAIDS get a promise of marriage: toss mini bridal bouquets all at once! Unless you have tons and tons and I mean, tons of bridesmaids, you won't need a t-shirt canon to launch these into the air. Hold these like a regular bouquet and toss them all together over the shoulder as you normally would.
Watch the bridesmaids go nuts! Watch the faces of the crowd looking on! Stunned amazement will be read all over their faces! That is a great and special memory for everyone! Besides, give them something to talk about if you know deep down that your food is horrible, but you served it anyway.