His buddy was a regular to Malta. He was a BSAC Dive Leader and also had his advanced nitrox and extended range, so roughly similar to a PADI DM with a Tec 50 cert. The two of them jumped in first, and I was one of the last in. As I swam for the shot, the two of them were swimming back, with the second diver looking distressed and the first towing him. I watched them onto the boat and waited for an 'okay' signal. On the signal, my buddy and I descended.
I spotted the two divers had made it back into the water as they were on the wreck. Big 'okay' signal and both looking happy. Back on the boat, I went to see they were okay:
"Yeah, I'm fine. It was these weights", he said?
"Yeah?", I replied.
"Yeah! I need sixteen pounds and they had two 'stamped' on them, so I took eight."
What I wanted to say would probably upset the ScubaBoard swear-filter so much it would alert the pope if I typed it. Because I'm nice, I just said, "They're two kilo, not two pounds.".
"Yeah! I know that now..."