Flat on trainer

I didn't think it was possible, but I flatted on the trainer yesterday. It was one of those days where things were amiss. I switched the road tire with the trainer tire. I must not have checked it closely. I was in the middle of the workout, when POP. I saw a bulge in the tire where the tube was trying to come out. I thought I could get away with fixing the tube placement and just reinflating. No such luck. I put the bike back on the trainer and it went flat again. I took the wheel off and replace the tube. I then proceeded to finish the workout. It takes the cycle ops a few minutes to warm-up, so I had to push bigger gears for a few intervals. Otherwise training has been going well. I have had several good workouts in all 3 sports for a few weeks. I think they finally caught up with me late last week. My legs started to get heavier and heavier. A few lighter days of training seems to have me back on track. I swam a crazy fast set on Monday. 10x50 on 40. I touched and my 500 was 6:37 short course meters. I attempted to do it twice and only made 6 as my middle toes were going completely numb. Next big race will be Boise 70.3 in June.