human rxn time?

physics n chem (n actually maths too) dun tally with each other.. today jasmine n me were like tokin abt wat's de human rxn time.. physics says 0.2sec.. chem i cant rmb.. but well.. try to see ur reaction time here lah:

http://www.dynamicdrive.com/dynamicindex12/reflex.htm

mine fastest was 0.297s.. a bit de slow..