Does anyone remember laughter?

[ternia@xxxxxxxx (Tonya M Snyder)]

Anyone that can help,

All I can remember is there is one performance in particular where Led
Zep plays Stairway, the crowd is silent, and Plant adds, Does anyone
remember laughter? At least I think it is with Zep. 

Can anyone add to this?
Thanks,
Tonya :)
"Wondering and wandering....", Achilles Last Stand, Led Zeppelin.