While teaching, I was flying with a gal that did a pretty good job. I pulled the engine on her and she picked the field and started setting up. She went through her flow checks and cleaned it up. She was heading right for the end of the field and things were going great. I saw that she was set up almost perfect and we were getting down to about 100 feet, so I said "go around".

She paused, and didn't add throttle right away, but pulled back on the yoke. We were now down to the tree tops, but no big deal, had a huge field in front of us. I pointed to the throttle and she pushed it in, dumped the carb heat, and started to recover. Because she was now slow, climbing wasn't happening. The trees at the other end started to get bigger. I had her drop the nose and pick up some speed and pull to get over the trees.

Whew! It was close but we made it.

Gotta keep an eye on them. You never know when they are going to pause on adding throttle or pull up before adding it.