Tonight's workout - 2x Tabata intervals

Tonight's workout was a first for me. I've always done Tabata intervals one set every few days, but tonight I thought I'd try two sets. What a bad idea. The first set of 8 intervals was barely doable. I needed about 10 mins to recover for my next set. Just before the second Tabata set, a group of runners - all girls - came to the Great Lawn 800m lap. I appreciated their supporting applause as I sprinted past them the first time. Right around the finish, they saw me flopping and almost stumbling through my 7th rep. Embarassing. I couldn't hold form any longer so I skipped the last repeat. Needless to say, it was a great workout. Double punishment to make up for my missed workout last night. I'm going to sleep very well tonight.