I did a search but could not find a discussion on how many Spikez a Grunt can walk across before turning into Goo. I know such a thread existed at one time, so will search "old threads" next to try to find it.
Of course, once that information is available to me, I will create an entry in the Index to the GLEM which will provide the answer.
I have a sneaking suspicion that the result will partially depend on the Grunt involved; a walks faster (thus further) and a Grunt carrying the walks slower (dies faster) and a Powerup such as probably doubles how many Spikez the Grunt with it may travel.
I would not want to update each Grunt's HTML member with the results, so will create a document titled something like "How Spikez affect Health".