Genius or Mad Man?

I presented an ambitious proposal to a couple of engineers more experienced in the space, and whilst everything they said and asked about was measured and reasoned, the look they had on their faces was as if they were wondering whether I was sane. On reflection, it is a look that I have likely given to others many times in the past, whenever I am thinking "if you manage to achieve what you propose, I will be suitably impressed by your genius. If not, I will merely be right."