This has been confirmed as many Christadelphians' worst fear, that they would be the only one still standing with eyes closed after everyone else had sat down after a prayer.
Most members in the audience soon realised part-way through the next few sentences that the brother had moved on to the next agenda item, and quickly sat down, hoping that those in the rows behind hadn't been paying attention.
However, a few members had become so well trained to doze off during the prayers, listening only for the word "Amen" at the end, that they remained standing with their eyes firmly closed right through the exhort. The Presiding Brother again forgot the "Amen" at the end of the next prayer, but someone from the audience yelled it out, allowing those still standing to finally sit down.