tuck pendleton ( dennis quaid ) be a hotshot navy pilot on an unusual and top secret mission while he be to be shrink down and inject into the body of a rabbit and but when thing go wrong he end up inside jack putter ( martin short ) instead . jack must now work with tuck in order to stay alive while and it a great ride . all the cast be good in this film and but martin short be brilliant while it wall to wall action and adventure and laugh and and with a little romance throw in and it a winner . the special effect be outstanding for the time and joe dante direction be excellent . innerspace be fun for the whole family positive .