You cant always ask your LOR
Yesterday I was in the supermarket parking lot unloading my shopping cart and these 2 women (Probably a mother and daughter) and the older woman asks me if she can have the shopping cart (I was done with it) and I gave it to her.
She then told me she was a holocaust Survivor (She sounded like an old jewish grandmother) and insisted on giving me a brocha. Being that she was a survivor she must have been close to 90 or higher. I mean she really wanted to give me a brocha, Like put her hand on my head and give me a Brocha. The other woman (probably her daughter) was looking horrified.
So I ask the Oilam, What would you do if some 90ish year old woman insisted on putting her hand on your head to give you a brocha. You cant ask your LOR there is no time