I have a little experience with a multimeter, but I had never used the 10A setting.
I was messing around with an old stereo tuner that has four fuse-type lamps used to the light the dial. They are each 6.3V, 250mA. So I switched the cable and selector to 10A. Then I put the probes on either side of one lamp, and all four of them went out! Took the probes off and the lamps came back on. Suddenly got a sick feeling, thinking I had fried it, but everything appears to work fine.
What happened? Did I steal current from the lamps or short them? The second-highest setting on my MM is 200mA, so I thought that 250mA would blow the fuse on the meter. Hence my thinking that I should go to a higher setting.