Answer:
On April 29, 2014, Clayton Derrell Lockett suffered from a heart attack during his execution by lethal injection in the U.S. state of Oklahoma.
On January 18, 2018, Anthony Shore struggled to breathe by pentobarbital in Texas.
On October 28, 2021, John Marion Grant began convulsing and vomiting after the first drug. Mr. Grant has given a sedative drug a couple of minutes after. Then was declared dead soon after. Someone vomiting while being executed is very rare.
On May 3, 1946, in Louisiana Willie Francis was attempted to be executed by the electric chair. But an intoxicated officer had not properly set up the chair. Mr. Francis was badly shocked but survived.
Step-by-step explanation:
The first three were from AP news. Last was from deathpenaltyinfo.org.