some math take Vs as the fundamental stall speed now given that the maneuver speed Va- the maximum speed at which it is possible to stall without sustaining the limiting loads of the airplane the relationship
Va = Vs*Sqrt of n where
n='g'
shows that any airplane stalled at 1*Vs will attain 1 g, 2Vs 4 g's'
3Vs 9g's 4Vs 16 g's etc. if you give the plane a stalling incidence at 4 times the 1'g' stall speed you'll subject the plane to load far beyond even ultimate loads that goes for F16s too!!!
Note: a snap roll is really more of a a horizontal spin not stall