Potty training sucks

We were making great progress on the potty training until mommy went into the hospital. Then when I came home and was out of commission for a couple of days it totally messed him up. We can't even get Tyler to sit on the potty any more and it is very frustrating. This is supposed to be a fun post though. He has to flush the toilet always. It doesn't matter if I went, he went, the mail man went...he has to flush it. So when he started going on the potty he would flush the toilet and say "Bye pee-pee" or "bye poop-pooh" It made me laugh. Well, While I was still pregnant we went to story at the library and then were meeting Sarah and the kids for lunch. I had to go to the bathroom so I decided to go at the library. It is a typical bathroom with a handicapped stall and a regular one. Tyler chose the handicapped one and we went. I did my business and then Tyler says, "Can I flush it!" He runs over, flushes the toilet and proceeds to say REALLY LOUD, "Bye mommy's poop-pooh" I immediately started laughing and was completely embarrassed at the same time. What was the most embarrassing was that all I had done was number 1! But for some reason lately all he says is, "Bye poop-pooh" haha It doesn't matter what you actually do. I know this was a story that could have gone untold but I wanted to make sure I remembered it so I wanted to write it down. I love funny things like this. While I am writing and talking about bodily functions, any suggestions on getting him back to going on the potty? Cody and I are thinking we need to just throw some underwear on him and let him keep wetting himself until he decides to use the potty again. I know that sounds awful but we have tried so many things....a potty chart with stickers, treats, praise...prizes. We have run out of ideas. Any suggestions?