Now that has to get my vote as most dangerous way to tackle a tank 
Please note that track tank broken.
I believe that for the destruction of tanks infantrymen - tank should first be stopped. The best way - engineering obstacles. Anti-tank mines, tank traps (disguised pit). If there is no time to prepare defensive positions - you need to use a bundle of grenades, or anti-tank mines on the ropes or wooden boards for damage the chassis tank. After stopping tank you can destroy him Molotov cocktails (By the way, I do not know, as in other countries, but in the USSR have developed special combustible liquids for such bottles. They were hypergolic compounds similar to napalm. They were enough viscous fluid and it was impossible extinguish the fire. But there were other, hand-made - a mixture of kerosene and oil with gasoline made directly to troops).
But the best anti-tank infantry weapon for the initial period of the war were antitank rifles, provided their massive use. Even now in Ukraine they have shown their effectiveness against light armored vehicles (BTR and BMP).