I thought I could swim 1000m

Turns out I can, but I won't be able to walk afterwards.

Warmup:
50m free in 44
6 seconds rest
50m back in 1:04
56 seconds rest
50m breast in 0:58
6 seconds rest
50m fly in ~1:00

3 minutes rest

Workout:
250m free in 4:55
250m back in 7:35
30 seconds rest
125m breast, 125m fly in 7:30
30 seconds rest
250m free in 5:50

Total: 1200m

After I got out of the pool, I couldn't walk straight...my legs were were wobbly and I kept feeling like I was going to fall over. I had to lean over the water fountain for a minute or so and take it real easy walking back into the locker room. I peed, rinsed, spent a few minutes in the dry sauna, showered, and felt okay by the time I walked out of the gym. But that was not a feeling I enjoyed, except in that proud-masochist way.