Shaft mount roller rocker setup question

I'm thinking what if, so just a thought;
>What if the pushrod escapes custody and the rocker arm starts flopping around?
>If you float the valves; what happens in the time between the onset of float and the lifter pump up.?

I got the Blue ones (1.6) like in Pishta's pic, post #2.
They got over 100,000 miles on them now; I'm very happy with them.
I initially set mine up @.010 clearance per pair. But at the first inspection, I found that to be too tight. With Hughes 1129 springs, I also found the rockers too tight on the shafts or not enough oil. I fixed it.