ChuckR said:
Did you ever get to open an OS/2 session while running Windows 3 ???

Or Windows 95 -- Win 95 was supposed to be pretty good with 'multitasking'...
More tears, for your eyes only:
OS/2 - Wikipedia, the free encyclopedia
Still not to hot at multitasking, write 'do while(0);' in assembly to evade compiler optimizing and run it in a dosbox.

Then try to start another app in whichever version of windows.