I did similar to popa. the guy next to me had a siddur but what could i do? thats where he was.
Anyhow, today during supper i told someone the “forgetting al hanissim harachaman” so he wouldnt have to look it up in a bencher, then just for kicks also said the “forgetting rtzei bracha” so you might think i’m just so good at forgetting things so I added the birchas zimun for shave brachos (something I’ve never said for real.